Building Dynamic SQL Query Strings
Jan 17, 2008
Let me start by asking that no one try to convince me to use Stored Procs. The examples below are a lot more simplistic then my real world code and it just gets too complicated to try to manage the quantity of SPs that I would need.
I have an application that displays a lot of data and I've created a system for users to filter the data using checkboxlist controls, dropdown controls, etc. From this, I have a "core" query that selects the fields that display in my GridView. It has a base Select clause, From clause and Where clause. From this I then add more to the Where clause to apply these filter values.
Here's an example "core" query:
SELECT Profile.FirstName, Profile.LastName, Project.ProjectName
FROM Profile, Project
WHERE Profile.ProjectCode = Project.ProjectCode
From this if a user want's to only display profiles from NC, they could select that from the CBL and the query would be modified to:
SELECT Profile.FirstName, Profile.LastName, Project.ProjectName
FROM Profile, Project
WHERE Profile.ProjectCode = Project.ProjectCode
AND Profile.State IN ('NC')
My code would add the last line above since the user specified that they only wanted NC profiles.
This is very simple and I have this already going on with my application. Here's the problem. In order to accommodate all of the various filters, I have to inner join and left join a bunch of various tables. Many times I include tables that have no data to display or filter on and therefore impacts performance. Here's an example:
SELECT Profile.FirstName, Profile.LastName, Project.ProjectName
FROM Profile, Project, Agent
WHERE Profile.ProjectCode = Project.ProjectCode
AND Profile.AgentID = Agent.AgentID
From the query above, I have included the Agent table that holds the agent's contact information. One of my filters allows the user to type in an agents name to find all profiles assigned to it. Here's what that would look like:
SELECT Profile.FirstName, Profile.LastName, Project.ProjectName
FROM Profile, Project, Agent
WHERE Profile.ProjectCode = Project.ProjectCode
AND Profile.AgentID = Agent.AgentID
AND Agent.Name = 'Smith, John'
You can see now that it was necessary to have the Agent table already joined into the query so that when I used the agent name filter, it wouldn't crash out on me.
The obvious thing would be to only include the Agent table when searching for an agent name. This is ultimately what I'm looking to do, but I need a solid method to go about doing this. Keep in mind that I currently have 16 tables in my "core" query and many of those are not needed unless the filters call for it.
If anyone has any ideas on how to simplify this process I'm selcome to suggestions. We're using SQL 2000, but are looking to upgrade to SQL 2005, if that makes any difference. I know that the way I do table joins is compliant with SQL 2005 and I'm certainly open to suggestions that will make it forward compatible.
This app is using .NET 2.0 and written in VB.NET. Thanks for any help!
View 14 Replies
ADVERTISEMENT
Feb 4, 2008
I ran across this technique being used in an application the other day. It seems not a good idea to me. What do you think?
1. The proc builds a basic query, nothing real fancy, into a string variable called @SQL defined as varchar 2000. Depending on the result desired, the group by clause can be one of three different sort orders.
2. The string is executed via EXEC @SQL.
It seems to me that the whole process can eliminate the EXEC and just use some other construct. All the parameters are passed in via the initial call to the stored proc. It also seems that every time this is executed it will result in a new query compile and cache useage, no matter what. Wasteful? Should I take the developers aside and knock heads? I think the app was coded by some folks who were rookies then but may be willing to crack open their code. Or, am I the one that is a rookie?
Thanks for your inputs.
View 11 Replies
View Related
Apr 19, 2008
Hi i have a page whereby the user can make a search based on three things, they are a textbox(userName), dropdownlist(subcategoryID), and region (regionID). The user does not have to select all three, he or she can enter a name into the textbox alone and make the search or enter a name into the textbox and select a dropdownlist value, my question is how can i build this procedure, I tried this but it didnt work;
Code:
ALTER PROCEDURE [dbo].[stream_UserFind]
(
@userName varchar(100),
@subCategoryID INT,
@regionID INT
)
AS
declare @StaticStr nvarchar(5000)
set @StaticStr = 'SELECT DISTINCT SubCategories.subCategoryID, SubCategories.subCategoryName,
Users.userName ,UserSubCategories.userID
FROM Users INNER JOIN UserSubCategories ON Users.userID= UserSubCategories.userIDINNER JOIN
SubCategories ON UserSubCategories.subCategoryID = SubCategories.subCategoryID WHERE UserName like @UserName'
if(@subCategoryID <> 0)
set @StaticStr = @StaticStr + ' and SubCategories.subCategoryID = @subCategoryID '
if(@regionID <> 0)
set @StaticStr = @StaticStr + ' and SubCategories.RegionId = @regionID '
exec sp_executesql @StaticStr
)
View 2 Replies
View Related
Feb 18, 2008
Thanks in advance for taking the tiemt o read this post:
I am workingon an application in vb.net 2008 and I have 5 drop down lists on my page.
I have code that worked in .net 2005 for my databind but would like to use new features in 08 to do this same thing.
Here is my 05 code how would I do this same things in 08?
Dim db As New DataIDataContext
Dim GlobalSQLstr As String
GlobalSQLstr = "select Orig_City, ecckt, typeflag, StrippedEcckt, CleanEcckt, ManualEcckt, Switch, Vendor, FP_ID, order_class, Line_type, id from goode2 where 1=1"
If (ddlOrigCity.SelectedValue <> "") Then
GlobalSQLstr &= "and Orig_City = '" & ddlOrigCity.SelectedValue & "'"
End If
If (ddlSwitch.SelectedValue <> "") Then
GlobalSQLstr &= "and switch = '" & ddlSwitch.SelectedValue & "'"
End If
If (ddlType.SelectedValue <> "") Then
GlobalSQLstr &= "and Order_Class = '" & ddlType.SelectedValue & "'"
End If
If (ddlFormatType.SelectedValue <> "9") Then
GlobalSQLstr &= "and typeflag = '" & ddlFormatType.SelectedValue & "'"
End If
If (ddlVendor.SelectedValue <> "") Then
GlobalSQLstr &= "and Vendor = '" & ddlVendor.SelectedValue & "'"
End IfDim AllSearch = From A In db.GoodEcckts2s
If (ddlErrorType.SelectedValue <> "0") Then
GlobalSQLstr &= "and ErrorType = '" & ddlErrorType.SelectedValue & "'"
End IfDim cmd As New SqlClient.SqlCommand
Dim rdr As SqlClient.SqlDataReaderWith cmd.Connection = New SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings("ConnectionString1").ConnectionString)
.CommandType = Data.CommandType.Text
.CommandText = GlobalSQLstr
.Connection.Open()
rdr = .ExecuteReaderMe.gvResults.DataSource = rdrMe.gvResults.DataBind()
.Connection.Close()
.Dispose()End With
View 4 Replies
View Related
Dec 9, 2006
Disclaimer... I am very new to SQL server!
I am trying to create a stored proc. I am passing in some variables which are used as the "data" side of where clause tests, but I also want to pass in a couple of variables to be the variable side of the where clause test, can it be done?
i.e. select id from table where a=1 and b=2 order by my_order_field
becomes
select id from table where a=@data1 and b=@data2 order by @my_variable_field
and I call the sp with exex sp 1,2,my_order_field
Any clues?
View 10 Replies
View Related
Oct 9, 2006
The problem:
I have 2 tables, with a one to many relationship - lets say customers, and order items.
Each order record has a field that is meant to be a comma delimited list (they are reference numbers) that is driven by the quantity field. So, say in the order record, an item has a quantity of 3. The reference number will look like this:
1, 2, 3
And if the next order item for that customer has a quantity of 4, the reference number value is
4, 5, 6, 7
And the final item with quantity of 2:
8, 9
Reference numbers can either be auto assigned (and are in my web application) or manually set. If manually set they will NOT be numeric.
In my web application, it is possible for users to return to a customer's order and edit a line item. My problem is when users changes the quantity of an item, and I have to reset the reference numbers.
If the quantity of line item 2 changes from 4 to 3, I need to reset all the values for that, and any other, order item that comes after it:
4, 5, 6 (2nd)
7,8 (3rd with same quantity of 2).
I felt a cursor would be the best way to handle this. But I am having trouble re-assigning my variable to be the next number in the series when the cursor is running.
This is what I have so far. The print lines and hard coded values are for debugging purposes only.
DECLARE @NumberingType varchar(10)
DECLARE @TotalSum int
DECLARE @DoorLineItemID int
DECLARE @Quantity int
DECLARE @SeedInt int
SET @SeedInt = 1
SELECT @TotalSum = SUM(Quantity) FROM DoorLineItems WHERE UniversalOrderID = 12345
DECLARE UpdateRefCursor CURSOR FOR
SELECT DoorLineItemID, Quantity FROM DoorLineItems WHERE UniversalOrderID = 12345 AND NumberingType = 1
OPEN UpdateRefCursor
FETCH NEXT FROM UpdateRefCursor INTO @DoorLineItemID, @Quantity
DECLARE @RefNumberLine varchar(1024)
SET @RefNumberLine = ''
WHILE @@FETCH_STATUS = 0
BEGIN
WHILE @SeedInt <= @Quantity
BEGIN
SET @RefNumberLine = @RefNumberLine + CONVERT(varchar, @SeedInt, 101) + ', '
SET @SeedInt = @SeedInt + 1
END
PRINT @RefNumberLine
SET @SeedInt = @Quantity + @SeedInt
PRINT 'new seed: ' + CONVERT(varchar, @SeedInt, 101) + 'Quantity ' + CONVERT(varchar, @Quantity + @SeedInt, 101)
FETCH NEXT FROM UpdateRefCursor INTO @DoorLineItemID, @Quantity
END
CLOSE UpdateRefCursor
DEALLOCATE UpdateRefCursor
This returns the same delimited string for X number of items. So I'm getting this:
1,2,3
1,2,3
1,2,3
When I really want the results described above.
What am I doing wrong?
Thanks!
View 2 Replies
View Related
Mar 30, 2005
Hi
I am in the very final stages of
building a dating app for a client, I am totally stuck with the
advanced search page. been googling for days with limited success
For the most basic of purposes I have added a few form fields to my search.aspx page;
county (Dropdown list)
min age (Dropdown list)
max age (dropdown list)
Smoker (check box)
keyword (textbox)
My codebehind passes the vars to a stored procedure
@county = me.county.selectedvalue
etc
My problem is the stored procedure I sort of have the following but I can't get it to run
<code>
ALTER PROCEDURE dbo.TEST_ADVANCED_SEARCH
(@countyID int ,
@MaxAge
varchar(100),
@MinAge
varchar(100),
@smoker tinyint),
@keyword
varchar(250))
AS
DECLARE @SQL Varchar
(4000)
SELECT @SQL = 'dbo.user_accounts.profileComplete,
dbo.user_accounts.countyID, dbo.user_profiles.smoker,
dbo.user_profiles.Age
FROM dbo.user_accounts INNER
JOIN
dbo.user_profiles ON dbo.user_accounts.userID =
dbo.user_profiles.userID
WHERE (dbo.user_accounts.profileComplete =
1)'
IF @countyID > 0
SELECT @SQL = @SQL + ' AND
(dbo.user_accounts.countyID = @countyID)'
IF @MaxAge IS NOT
NULL
SELECT @SQL = @SQL + ' AND (dbo.user_profiles.Age <= @MaxAge)
'
IF @MinAge IS NOT
NULL
SELECT @SQL = @SQL + ' AND (dbo.user_profiles.Age >= @MinAge)
'
IF @smoker > 0
SELECT @SQL = @SQL + ' AND
(dbo.user_profiles.smoker = 1)'
IF @keyword IS NOT
NULL
SELECT @SQL = @SQL + ' AND (dbo.user_profiles.Description LIKE @MinAge)
'
EXEC(@SQL)
</code>
If I can get this to work I can add the remaining fields that I need
Am I Missing something glaringly obvious?
Any help or advice gratefully received
Thanks
View 3 Replies
View Related
Oct 24, 2000
We are migrating from a file-server Access Database to a SQL server backend and Access front end system. I'm using ADO to access the data off the server but am implementing most of the business logic in stored procedures. All logic was coded in VBA earlier but i'm having to move that to T-SQL for performance issues. In many cases I have dynamically constructed SQL statements in code but I'm having some trouble in T-SQL. How can I do this in T-SQL?
' This is some VB code that shows how the query differs based on a parameter.
If Me![Sorting] = 1 Then
Me![ControlNumber].RowSource = "SELECT [DVD_Projects_Table].[DVD_Number], [Title] & "" : "" & [ID_Number] AS Display,__
[DVD_Projects_Table].Date FROM [DVD_Projects_Table] __
WHERE ((([DVD_Projects_Table].System) = IIf([Forms]![DVD_Projects_Form]![SystemFilter] = 1, ""525"", ""625""))) And __
(([DVD_Projects_Table].Active) = IIf([Forms]![DVD_Projects_Form].[ActiveOnly] = True, Yes, __
[DVD_Projects_Table].[Active]))) ORDER BY [DVD_Projects_Table].Title;"
Else
Me![ControlNumber].RowSource = "SELECT [DVD_Projects_Table].[DVD_Number], [ID_Number] & "" : "" & [Title] AS Display,__
[DVD_Projects_Table].Date FROM [DVD_Projects_Table]__
WHERE ((([DVD_Projects_Table].System) = IIf([Forms]![DVD_Projects_Form]![SystemFilter] = 1, ""525"", ""625""))) And __
(([DVD_Projects_Table].Active) = IIf([Forms]![DVD_Projects_Form].[ActiveOnly] = True, Yes, __
[DVD_Projects_Table].[Active]))) ORDER BY Int(Right([ID_Number],Len([ID_Number])-4));"
End If
This is the ideal sp that would do what I want but it is obviously incorrect. How can I get this logic implemented. I need to construct an SQL query based on the input parameters in a stored procedure.
CREATE PROCEDURE [procDVDProjectsList]
@SortBy as bit,
@ActiveOnly as bit,
@SysFilter as integer
AS
SELECT
CASE @SortBy
/* Display Title first */
WHEN 0 THEN [DVD_Number], [Title] + " : " + [ID_Number] AS Display, [DVD_Projects_Table].[Date]
/* Display Number first */
WHEN 1 THEN [DVD_Number], [ID_Number] + " : " + [Title] AS Display, [DVD_Projects_Table].[Date]
END
FROM
[DVD_Projects_Table]
WHERE
CASE @SysFilter
/* List all */
WHEN 0 THEN
/* List only NTSC */
WHEN 1 THEN [DVD_Projects_Table].[System] = "525"
/* List only PAL */
WHEN 2 THEN [DVD_Projects_Table].[System] = "625"
END
AND
CASE @ActiveOnly
/* List All */
WHEN 0 THEN
/* List only active */
WHEN 1 THEN [DVD_Projects_Table].Active = True
END
ORDER BY
CASE @Sortby
/* Sort Alpha */
WHEN 0 THEN [DVD_Projects_Table].Title
/* Sort Numeric */
WHEN 1 THEN Right([ID_Number],Len([ID_Number])-4)
END
Thanks for your help,
-Sumit Malik
View 1 Replies
View Related
Apr 19, 2008
Hi i have a page whereby the user can make a search based on three things, they are a textbox(userName), dropdownlist(subcategoryID), and region (regionID). The user does not have to select all three, he or she can enter a name into the textbox alone and make the search or enter a name into the textbox and select a dropdownlist value, my question is how can i build this procedure, this is what another user suggested but i am having trouble;
ALTER PROCEDURE [dbo].[stream_UserFind]
(
@userName varchar(100),
@subCategoryID INT,
@regionID INT
)AS
declare @StaticStr nvarchar(5000)set @StaticStr = 'SELECT DISTINCT SubCategories.subCategoryID, SubCategories.subCategoryName,Users.userName ,UserSubCategories.userIDFROM Users INNER JOIN UserSubCategories ON Users.userID= UserSubCategories.userIDINNER JOINSubCategories ON UserSubCategories.subCategoryID = SubCategories.subCategoryID WHERE UserName like @UserName'
if(@subCategoryID <> 0) set @StaticStr = @StaticStr + ' and SubCategories.subCategoryID = @subCategoryID 'if(@regionID <> 0) set @StaticStr = @StaticStr + ' and SubCategories.RegionId = @regionID '
exec sp_executesql @StaticStr
)
View 10 Replies
View Related
Oct 14, 2004
Hi all,
I'm gonna need some help with this one.
I have this stored procedure written up that basically builds a dataset by querying a bunch of tables using outer joins. Our problem now is that it seems it takes a while for the dataset to pull back across the network. We would hence like to filter that dataset by adding on to the query in the procedure dynamically. Heres the query from the proc below:
SELECTN_Client.Prefix,
IsNull(dbo.N_CLIENT.SURNAME, '') + ', ' + IsNull(dbo.N_CLIENT.FIRST_NAME, '') AS Client_FullName,
dbo.N_CLIENT.TITLE,
dbo.N_COMPANY.COMPANY_NAME,
dbo.N_BUSINESS_UNIT.BUSINESS_UNIT_NAME,
dbo.N_DIVISION.DIVISION_NAME,
dbo.N_REF_INDUSTRY.INDUSTRY_NAME,
dbo.N_CLIENT.DIRECT_PHONE,
dbo.N_CLIENT.EMAIL,
dbo.N_CLIENT.TIER_ID,
(SELECT COUNT(Client_ID)
FROM N_Alumni
WHERE N_Alumni.Client_ID = N_Client.Client_ID) AS Alumni,
(SELECT COUNT(Client_ID)
FROM N_XREF_Client_Activity
WHERE N_XREF_Client_Activity.Client_ID = N_Client.Client_ID AND Activity_ID = 1) AS SandB,
(SELECT BAH_EMP_NID
FROM N_XREF_Client_Activity
WHERE N_XREF_Client_Activity.Client_ID = N_Client.Client_ID AND Activity_ID = 1) AS SandBMailer,
(SELECT N_Vw_Client_BAH_Contact.BAH_EMP_NID
FROM N_Vw_Client_BAH_Contact
WHERE Relationship_Type_Code = 'MM' AND N_Vw_client_BAH_Contact.Client_ID = N_Client.Client_ID) AS MMEMPNID,
dbo.N_CLIENT.SURNAME AS Client_Surname,
dbo.N_CLIENT.FIRST_NAME,
dbo.N_CLIENT.FIRST_NAME AS Client_FirstName,
dbo.N_CLIENT.COMPANY_ID,
dbo.N_CLIENT.DIVISION_ID,
dbo.N_CLIENT.BUSINESS_UNIT_ID,
dbo.N_COMPANY.GROUP_ID,
dbo.N_CLIENT.COUNTRY,
dbo.N_GROUP.GROUP_NAME,
dbo.N_CLIENT.CLIENT_ID,
(SELECT IsNull(N_Vw_Client_BAH_Contact.First_Name, '') + ' ' + IsNull(N_Vw_Client_BAH_Contact.Surname, '')
FROM N_Vw_Client_BAH_Contact
WHERE Relationship_Type_Code = 'PC' AND N_Vw_client_BAH_Contact.Client_ID = N_Client.Client_ID) AS PCFullName,
(SELECT N_Vw_Client_BAH_Contact.BAH_EMP_NID
FROM N_Vw_Client_BAH_Contact
WHERE Relationship_Type_Code = 'PC' AND N_Vw_client_BAH_Contact.Client_ID = N_Client.Client_ID) AS PCEMPNID,
(SELECT NMT_Practice_Code
FROM N_Vw_Client_BAH_Contact
WHERE Relationship_Type_Code = 'PC' AND N_Vw_client_BAH_Contact.Client_ID = N_Client.Client_ID) AS NMT_Practice_Code,
(SELECT NMT_Practice_Name
FROM N_Vw_Client_BAH_Contact
WHERE Relationship_Type_Code = 'PC' AND N_Vw_client_BAH_Contact.Client_ID = N_Client.Client_ID) AS NMT_Practice_Name,
#returnTable.AddlFullName,
#returnTable.AddlEMPNID,
#returnTable.FunctionID as Function_ID,
#returnTable.FunctionName as Function_Name,
(SELECT IsNull(N_Vw_Client_BAH_Contact.First_Name, '') + ' ' + IsNull(N_Vw_Client_BAH_Contact.Surname, '')
FROM N_Vw_Client_BAH_Contact
WHERE Relationship_Type_Code = 'CSO' AND N_Vw_client_BAH_Contact.Client_ID = N_Client.Client_ID) AS CSOFullName,
(SELECT N_Vw_Client_BAH_Contact.BAH_EMP_NID
FROM N_Vw_Client_BAH_Contact
WHERE Relationship_Type_Code = 'CSO' AND N_Vw_client_BAH_Contact.Client_ID = N_Client.Client_ID) AS CSOEMPNID,
ISNULL(dbo.N_CLIENT.ARCHIVE_FLAG, 'N') AS Archive_Flag,
dbo.N_COMPANY.TARGET_COMPANY_FLAG,
dbo.N_COMPANY.INDUSTRY_ID,
N_Client.Address1,
N_Client.Address2,
N_Client.Address3,
N_Client.Address4,
N_Client.Address5,
N_Client.City,
N_Client.State,
N_Client.Postal_Code,
N_Client.Country,
N_Client.Region,
N_Client.Office_Code,
N_Client.Broderick_Target_Flag
FROMdbo.N_CLIENT
INNER JOIN
dbo.N_COMPANY ON dbo.N_CLIENT.COMPANY_ID = dbo.N_COMPANY.COMPANY_ID
LEFT OUTER JOIN
dbo.N_GROUP ON dbo.N_COMPANY.GROUP_ID = dbo.N_GROUP.GROUP_ID
LEFT OUTER JOIN
dbo.N_REF_INDUSTRY ON dbo.N_COMPANY.INDUSTRY_ID = dbo.N_REF_INDUSTRY.INDUSTRY_ID
LEFT OUTER JOIN
dbo.N_DIVISION ON dbo.N_DIVISION.DIVISION_ID = dbo.N_CLIENT.DIVISION_ID
LEFT OUTER JOIN
#returnTable ON #returnTable.CLIENT_ID = dbo.N_CLIENT.CLIENT_ID
LEFT OUTER JOIN
dbo.N_BUSINESS_UNIT ON dbo.N_CLIENT.BUSINESS_UNIT_ID = dbo.N_BUSINESS_UNIT.BUSINESS_UNIT_ID
ORDER BY N_Client.client_id
Where upper(title) like '%parameter_value%'
and company_id = 'parameter_value'
and Nmt_practice_code = 'parameter_value' ...............and so on
What we would like to do is to add 15 (where some may be null) input parameters to the definition of the query and then somehow (where the parameter is not null), dynamically add that parameter to the WHERE clause of the query illustrated in italics above. The bold print are examples of 3 of the 15 parameters to be passed into the query by the proc, so basically
title, company_id,Nmt_practice_code would be the 3 parameters being passed into this proc.
So in other words if 9 parameters out of the 15 are passed into the proc, we would like those 9 parameters to be added/built dynamically onto the SQL Query as 9 predicates. I hope I have been clear. Does anyone have any experience with this??? Help!!
Thanks
View 2 Replies
View Related
Jul 20, 2005
Hi;I would like to read a list of tables from a temp table and then do asql statement on each table name retrieved in a loop, ie:-- snip cursor loop where cursor contains a list of tablesdeclare @rec_count intset @rec_count = 0exec('select @rec_count = count(myfield) from ' + @retrievedTableName)This does not work. SQLSERVER tells me @rec_count is not declared.How can I get the @rec_count populated....or can I?Thanks in advanceSteve
View 3 Replies
View Related
Nov 4, 2015
Within a trigger, I'm trying to create a unique table name (using the NEWID()) which I can store the data that is found in the inserted and deleted tables.
Declare @NewID varchar(50) = Replace(convert(Varchar(50),NEWID()),'-','')
Declare @SQLStr varchar(8000)
Set @SQLStr= 'Select * into [TMPIns' + @newID + '] from inserted'
Exec (@SQLStr)
I get the following error: Invalid object name 'inserted'
I know I can do:
Select * into #inserted from inserted
Set @SQLStr= 'Select * into [TMPIns' + @newID + '] from #inserted'
Exec (@SQLStr)
But I don't want to use TempDB as these tables can become big and I also feel that it is redundant. Is there a way to avoid the creation of #inserted?
View 2 Replies
View Related
Feb 5, 2007
Hi,
I am looking to allow a user to select which database they need to connect to, and then for them to be able to use that connection string until they choose a different database. I have a separate database specifically to hold the list of databases with the respective connection strings, and various forms that are currently looking at the web.config for the connection string. Unfortunately, I can't just put all the connection strings into the web.config as the number of databases available to the user will increase on a weekly basis which will be handled by a database administrator, so I want a user to select from a list of databases (for which they have permissions), and for that connection string to remain for that user. Potentially there will be 20 or more users each connected to a different database (all SQL Express).
If anyone can provide any help on this I will be truly thankful as I've hunted on the internet for hours and have been unable to find anything that has helped.
Thanks in advance.
Paul
View 4 Replies
View Related
Feb 6, 2007
Dynamic connection strings
I have found lots of people asking for something similar to this but cannot find any solutions - can you help?
I am developing an application (ASP.Net2) in which users are associated with 'Clients' and every Client has their own SQL Server database.
Users are authenticated using standard ASP.Net Authentication via a separate database (common for all users). This includes a table linking them to a Client and each Client record includes the connection string to their database. Currently a default connection string is held in the web.config file.
My problem is that I don't know how to dynamically change the connection string after a user has logged on. I have a large number of databound controls, many of which are declared and some are coded in the VB.Net code behind. I know I can use code behind to change the connection string for a SQLDatatSource:
I thought I had it cracked with the following:
Public objClientConnection As New ConnectionStringSettings
Public Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs)If Session("ClientDBConnectionString") <> "" ThenobjClientConnection.ConnectionString = Session("ClientDBConnectionString")objClientConnection.Name = "ClientDBConnection"objClientConnection.ProviderName = "System.Data.SqlClient"ElseobjClientConnection = ConfigurationManager.ConnectionStrings("WebTool1ConnectionString")End IfEnd Sub
The session variable Session("ClientDBConnectionString") holds the client specific connection string and is populated when the user logs on. If this is not populated then the connection string defaults to one collected from web.config. This should ensure there is always a design time connection string available.
The trouble is, when I try and declare the SQL data souce like this:
<asp:SqlDataSource ID="dsTest" runat="server" ConnectionString="<%# objClientConnection.ConnectionString %>" SelectCommand="usp_SEL_DocumentTypes" SelectCommandType="StoredProcedure" ></asp:SqlDataSource>
I get an error: The ConnectionString property has not been initialized.
I have been going around in circles on this for days and would really appreciate some help. Am I on the right lines? What needs to change to make it work? Is there a better way?
Many thanks,
Cliff
View 50 Replies
View Related
Jun 21, 2007
I am trying to split a .csv file on a week+location key. As there are 500+ locations and 52 weeks in a year this is not a manual task.
I have a Script component written but need to dynamically open/close the connection manager changing the connection string in between, to the Week+location key as the filename.
It has to be do-able because the ForEachLoop does it. But how do I?
View 10 Replies
View Related
Oct 11, 2006
Possible or not? -->
I maybe lazy - but I want to achieve just specifiying 1 variable in SSIS package ("environment") - and all the connectionStrings should "poof" magically be adjusted to correct locations
In DTS I created a SetDTSenvironmentVariables function for all my packages - so how wouldIi achieve this in SSIS?
Function SetDTSenvironmentVariables( environment )
Folder = "MyDtsPackageFolder"
Select Case environment
case "DEV"
DTSGlobalVariables("WorkingDirectory").value = "C:Packages" & Folder
case "STAGING"
DTSGlobalVariables("WorkingDirectory").value = "D:Sql_working_directoryMy_productionSTAGING" & Folder
case "LIVE"
DTSGlobalVariables("WorkingDirectory").value = "D:Sql_working_directoryMy_production" & Folder
End Select
'
' Set Connection Properties
'
dim oPackage, oConn
set oPackage = DTSGlobalVariables.parent
oPackage.LogFileName = DTSGlobalVariables("WorkingDirectory").value & "LogsErrors.txt"
For Each oConn In oPackage.connections
Select Case oConn.Name
case "My_DB"
Select Case environment
case "DEV"
oConn.datasource = "SERVER01"
oConn.Catalog = "My_Production"
case "STAGING"
oConn.datasource = "SERVER06"
oConn.Catalog = "My_Staging"
case "LIVE"
oConn.datasource = "SERVER06"
oConn.Catalog = "My_Production"
End Select
case "Schools.xls"
oConn.datasource = DTSGlobalVariables("WorkingDirectory").value & "" & "School_Codes.xls"
case else
oConn.datasource = DTSGlobalVariables("WorkingDirectory").value & "" & oConn.Name
End Select
Next
set oPackage = nothing
set oConn = nothing
End Function
View 14 Replies
View Related
Feb 14, 2007
Hello,
This will probably be trivial and basic for most, but I'm having a hard time trying to figure out the best way to do a SELECT statement. First, let me explain what I have:
Two tables:
Table 1:
Orders
Some of the fields:
ID
PropID
WorkOrderNum
OrderDesc
DateCompleted
Table 2:
OrderDetail
ID
OrderID
TenantName
As you probably have realized, the OrderID in my 'OrderDetail' table corresponds to the ID field in my 'Orders' table. The 'Orders' table contains the order header information, while the OrderDetail contains line items for that order - 1 line item per record.
Here is my SQL statement to retrieve an order when searching by the 'Order Description' (Orders.OrderDesc):
SELECT PropertyLocations.PropertyLocation, Orders.ID, Orders.PropID, Orders.WorkOrderNum, Orders.OrderDesc, Orders.DateCompleted FROM PropertyLocations, ORDERS WHERE PropertyLocations.ID = Orders.PropID AND OrderDesc LIKE '%lds%'
Ok, so now for the 'big' question/problem: I also need to be able to search the 'Tenant Name' field from the 'OrderDetail' table. So what is the best/most efficient way of doing that? The other stipulation about that is that there can be (and usually is) several records/line items (in the OrderDetail table, of course) that contains the same (or similar) data, but I don't want duplicates. And when I say duplicates, all I care about is retrieving a few fields (as you can see from my SQL statement) from the 'Orders' table. Another way to describe what I want is that I want all unique orders that have a 'TenantName' in the 'OrderDetail' table that matches the search criteria. My brain just isn't wanting to figure this out right now, so I was hoping someone could help me out.
thanks.
View 9 Replies
View Related
Jan 30, 2006
Hi there,
i have a query building question and was hoping that one of you would know the answer.
Here is what i need to do :(i am using asp.net and ado.net)
I have 1 table where I store thedata, where 5 criteria determine a unique row in this table. Now, this has recently changed as the start date was added. So there potentially can be more than one entry in the table with same 5 criteria, but different start date.
I need to retrieve the row with the latest start date (currently active). The problem arises when the users enter less than 5 criteria. In this case the results may not possess same 5 criteria. Say the user searches based on 2 criteria. Then all the rows possessing these 2 ctieria will be returned, but other 3 criteria might differ with the results set.
But, i only need the latest start date row for each row. So for example, if i searched on 2 criteria, i got back 4 rows, 2 of which possess the same 5 criteria. But between these 2 i only need to display ONE row to the user - the one with the latest date.
How do i build a query? say the table name is tbl, and criteria 1 to 5 fields are called c1 ... c5, and start date field is called start_date.
thanks in advance
View 1 Replies
View Related
Apr 21, 2006
I am hoping someone can point me in the right direction with this.I have query that returns all the colums in a row (SELECT * FROM table WHERE value = 'value') and I need to build a table with this data. Some of the columns may not have values in them, and so I dont want to build a table row for it. I also need to use the column name as the table header. As an example:==============================Column Name || Column Value-----------------||-----------------Column Name || Column Value
-----------------||-----------------
I hope I have explained myself properly. Any help would be greatly appreciated.
View 4 Replies
View Related
Feb 12, 2007
Good Afternoon!
I have a (hopefully) simple question.
I have recently been bumped into an applications developer position. I took a week of ASP training a few months ago, but outside of that my exposure to ASP and SQL has been EXTREMELY limited.
I just undertook my first project using these skills. We have an application where I track "Letters". I fill out a form with information regarding the Letter, and save it so there is a record of the letters existence and what its status is.
Afterwards, we want to update the status, so I find the saved form, make my edits, and save it.
This is where my problem starts.
When I first save the letter, I have no problems whatsoever.
When I save it a second time after making my edits, I get an error:
Microsoft OLE DB Provider for SQL Server error '80040e14'
Line 1: Incorrect syntax near 'yearID'.
/AuditFlowChart/UpdateAudit.asp, line 206
What I am doing with the ASP is basically created a SQL statement to update the table with the new letter information. I added a line to print out the store proceedure that is being created by the following line
Set rsRecordsetObject = objCOMComponentClassObject.ExecuteSQLStatement(spStoredProcedure,vntSQLServerName,dbDatabaseCatalog)
I print out spStoredProcedure and I get the following
UpdateCorrespondence @p_idCorr = 416,
@p_dtOfLetter = '8/7/2008',
@p_dtRcvdByRespAtty = '2/19/2007',
@p_dtRcvdByAdmin = '2/23/2007',
@p_descOfEntity = 'This is a test 2009 letter. Dated 2/8/2007',
@p_ClientCode = '01074',
@p_MatterCode = '0055',
@p_dtDue = '3/15/2007',
@p_dtEffective = '4/18/2007',
@p_dtYE = '4/8/2007',
@p_respAtty = '0330',
@p_respAttyFull = 'Abelson, H. Edward',
@p_prepParalegal = 'Aldous, Anne Marie',
@p_prepAtty = 'Abromowitz, David',
@p_prepLitParalegal = 'Allegrini, J. Samuel',
@p_dtGivenToParalegal = '4/20/2007',
@p_dtGivenToAtty = '2/28/2007',
@p_dtMemoCirculated = '2/18/2007',
@p_dtRespSentToLitParalegal = '2/10/2007',
@p_dtRespSentToPrepAtty = '2/26/2007',
@p_dtSentToAccountant = '2/15/2007',
@p_memoDSid = 1111111,
@p_respLetterDSid = 2222222,
@p_sideLetterDSid = 3333333,
@p_comments = NULL,
@p_yearID = rsLetterDetail1('yearID'),
@p_opinion = 1,
@p_complete = 0,
@p_userID = 'GSSUSO1517'
When I run the above thru Query Analyzer, I get the following:
Server: Msg 170, Level 15, State 1, Line 26
Line 26: Incorrect syntax near 'yearID'.
So now I know where my error lies, but I am not sure where to look next. Does anyone have any ideas? Is there a problem I am not seeing with the query?
Any help would be wonderful and much appreciated.
View 2 Replies
View Related
Sep 13, 2007
Hi,
I'm using 2005 management studio express.
Can I use the graphical query builder to specify tables from more than one database?
I know I can do this in sql in the format database..table.column but in the query builder it only shows tables from the current database. Can you get around this?
Thanks
View 1 Replies
View Related
Jun 15, 2006
I am trying to generate some datasets with some queries...With a given series information, it should return PART_NOs that has STD= 1 and a unique price at that particular 'START', and keeping the'TYPE' in consideration...DB examples below:Main DBIDPART_NOSERIESSTD1A-1A12A-2A13A-3A14D-1D15D-2D0Price DBIDPART_IDTYPESTARTPRICE501X100050511X1000040521Y100060531Y1000050542X100050552X1000040562Y100060572Y1000050582X100090etc.main.ID and Price.PART_ID are paired together.So in an example case, lets say I am querying for SERIES A, with TYPEX. A table should be outputted something likePART_NOA-1100050A-11000040A-3100090Note how it skipped printing A2 because the price is the same as A1.I'm really looking for the SQL code here... I can't get it to filter ondistinct price.SELECT MAIN.PART_NO, PRICING.START, PRICING.PRICEFROM MAIN, PRICINGWHERE (MAIN.SERIES LIKE 'A')AND (MAIN.STD = '1')AND (PRICING.PRICE != '')AND (PRICING.TYPE = 'X')AND (MAIN.ID = PRICING.PART_ID)I've been trying to use GROUP BY and HAVING to get what I need but itdoesn't seem to fit the bill. I guess I'm not terribly clear on how Ican use the SQL DISTINCT command...? If I try and use it in my WHEREstatement it gives me syntax errors, from what I understand you canonly have distinct in the select statement? I'm not sure how tointegrate that into the query to suit my needs.Thanks for any help.
View 4 Replies
View Related
May 15, 2008
Hi,
Does anybody know if it is possible to obtain an alias from a Query without using Dynamic SQL.
My Problem Looks like this:
CREATE TABLE Source (SourceName varchar(50), SourceAge int)
INSERT INTO Source VALUES ('Mary',41);
INSERT INTO Source VALUES ('John',22);
INSERT INTO Source VALUES ('Tom',15);
INSERT INTO Source VALUES ('Bill',55);
The Statement should look like This:
SELECT A.SourceAge AS A.SourceName FROM Source A;
The Result should look like this:
Mary John Tom Bill
----------------------------------------
41 22 15 55
Thanks in advance
Raimund
View 2 Replies
View Related
Feb 27, 2007
I have a class that works fine using the SQLDataReader but when I try and duplicate the process using a Dataset instead of a SQLDataReader it returnsa a null value.
This is the code for the Method to return a datareader
public SqlDataReader GetOrgID()
{
Singleton s1 = Singleton.Instance();
Guid uuid;
uuid = new Guid(s1.User_id);
SqlConnection con = new SqlConnection(conString);
string selectString = "Select OrgID From aspnet_OrgNames Where UserID = @UserID";
SqlCommand cmd = new SqlCommand(selectString, con);
cmd.Parameters.Add("@UserID", SqlDbType.UniqueIdentifier, 16).Value = uuid;
con.Open();
SqlDataReader dtr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return dtr;
This is the code trying to accomplish the same thing with a Dataset instead.
public DataSet organID(DataSet dataset)
{
Singleton s1 = Singleton.Instance();
Guid uuid;
uuid = new Guid(s1.User_id);
string queryString = "Select OrgID From aspnet_OrgNames Where UserID = @UserID";
SqlConnection con = new SqlConnection(conString);
SqlCommand cmd = new SqlCommand(queryString, con);
cmd.Parameters.Add("@UserID", SqlDbType.UniqueIdentifier, 16).Value = uuid;
SqlDataAdapter adapter = new SqlDataAdapter();
adapter.SelectCommand = cmd;
adapter.Fill(dataset);
return dataset;
}
Assume that the conString is set to a valid connection string. The Singlton passes the userid in from some code in the code behind page ...this functionality works as well.
So assume that the Guid is a valid entry..I should return a valid dataset but its null.
View 2 Replies
View Related
Sep 22, 2006
I currently have a form that has different options in a list box such as:Status Codes
View 3 Replies
View Related
Sep 8, 2006
Using a language that using A4GL to connect to the database. From within the language(COBOL) we have the ability to add a simple query. All is fine with one exception. Some of the fields might have a quote mark in it.
we have a field in particular that a lot of our clients like to put an apostrophe in. such as 0001A'06, 2'11" and so on. Now from inside our programs and using the simple query we add something like 'where ap_id = '0001A'06' which i know is an error but is there a way around this or a way to make it work?
View 3 Replies
View Related
Feb 27, 2008
This should be an easy enough answer to find if I just knew what to search on!
I am building a query within my stored procedure based on what parameters are passed in. For example, suppose I have a table with first name and last name. I can call the sp with either first name or last name or both, so I build a query accordingly that says:
select * from tblNames where FirstName = 'Hannah'
or
select * from tblNames where LastName = 'Montana'
or
select * from tblNames where FirstName = 'Hannah' and LastName='Montana'
My problem is putting the single quotes around the variable value.
SELECT @whereClause = @whereClause + ' AND tblNames.LastName=' @LastName-with-singlequotes-around-it
Thanks
View 3 Replies
View Related
Apr 4, 2008
The View SQL below takes 1:50 minutes to execute. I am looking for a way to improve processing time and keep the view select statements as simple as possible.
One part of the view that could be restructured is the lookup for the current term (TERM_TBL - bolded). When I hard code the current term my execution time drops to about 13 seconds
There are three possible values for the current term; one for each of our three acedemic careers (UGRD, CONT, & EXED). Could this information be looked up once and then each enrollment selected based upon the appropriate academic career current term value? If so, how would it be restructured? Currently, the lookup is done for every enrollment record.
There are no common fields between the NAMES table and the TERMS_TBL.
Code Snippet
SELECT A.EMPLID, A.LAST_NAME_SRCH, A.FIRST_NAME, A.MIDDLE_NAME, A.LAST_NAME
FROM NAMES A
WHERE A.EMPLID IN (
SELECT DISTINCT B.EMPLID
FROM STDNT_ENRL B
WHERE B.INSTITUTION = 'AAAAA'
AND B.STRM >= (
SELECT DISTINCT T.STRM
FROM TERM_TBL T
WHERE T.INSTITUTION = B.INSTITUTION
AND T.ACAD_CAREER = B.ACAD_CAREER
AND T.TERM_BEGIN_DT <= GETDATE()
AND T.TERM_END_DT >= GETDATE())
AND A.EMPLID NOT IN (
SELECT DISTINCT C.EMPLID
FROM SRVC_IND_DATA C
WHERE C.INSTITUTION = 'AAAAA'
AND C.SRVC_IND_CD = 'DPL' )
AND A.NAME_TYPE = 'PRI'
AND A.EFFDT = (
SELECT MAX(D.EFFDT)
FROM NAMES D
WHERE D.EMPLID = A.EMPLID
AND D.NAME_TYPE = 'PRI'
AND D.EFFDT <= GETDATE() )
Any suggestions will be gladly accepted. Keep in mind that the new and much improved must be legal within the context of a view select statement.
Thanks,
Steve
View 3 Replies
View Related
May 31, 2006
ASP.net 2.0 (VB), SQL Server 2005:While creating a new TableAdapter in design section, I'm using the query builder and trying to write a query within "LIKE" statement as below -Example1: SELECT * FROM table WHERE field LIKE @'%TextBoxData%'Example2: SELECT * FROM table WHERE field LIKE '%@TextBoxData%'
but these query doesn't work...error in building query...any clue to make it work? If I remove "@" sure the query will work with normal but '%TextBoxData%' will become a hardcoding value...this is not I want...I want make the TextBoxData become a flexible value depend on the data what I enter in my text box like 'abc,123' not like 'TextBoxData'...
I know normally it supposed to be like:
"SELECT * FROM table WHERE field LIKE '%" & TextBoxData.Text & "%'"
It can work when in Code Section, but not at this time...because now i'm trying to made it with "Query Builder" for TableAdapter " in Design Section...hmm did you get what I mean? Sorry for my bad english
Thanks in advance
View 3 Replies
View Related
Feb 7, 2007
I am using query strings to pass data from web form to web form and I have two questions. First if i use a asp:sqldatasouce to fill up a grid view and I have my select command set to a paramater that get whatever is in the query string it will not work because whatever is in the quers string gets a " ' " put in front and in the back of it. So if the query string was 5 whene it does the sql statement it sets my paramater = '5' not just 5 so its wont work. How can I fix this using the asp:sql datasource my aspx code looks like
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Rental PropertiesConnectionString %>"
SelectCommand="SELECT * FROM [APARTMENTS] WHERE ([PROPERITY_ID] = @PROPERITY_ID)">
<SelectParameters>
<asp:QueryStringParameter Name="PROPERITY_ID" QueryStringField="key" Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
Also since i have not been able to get around this so i have been wrting code in vb.net to attact a dataset to a grid view to populate it based on the query string i would do the following in vb.net to get ride of the ' in front and behind the query string
Dim y as string = "'" // " ' "
key = Request.QueryString("key").trim(y.tochararray)
But now i am doing another project in C# and I have re-written the above code in C# it will run but it will not take the " ' " out form infront or behind key. How does this need to be changed up?
string y = "'";
key = Request.QueryString["key"].trim(y.tochararray());
View 3 Replies
View Related
Mar 16, 2007
Hi, I have a SQLDataSource binding to a GridView and can come to the page either with or without a query string attached:
/ProjectManagement/reporting/project.aspx
/ProjectManagement/reporting/project.aspx?portfolio=3
When it comes with a query string, I can see in SQL Server profiler it executes and I get all the right data. When it is an empty string, or with no "?portfolio=" on it, it won't even execute against SQL server. Any ideas?
<asp:GridView ID="grid" runat="server" Width="600px"
ShowHeader="false"
AutoGenerateColumns="false"
DataSourceID="DSportfolio"
AllowSorting = "true"
AllowPaging = "true">
<Columns>
<asp:TemplateField>
<ItemTemplate>
.............
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="DSportfolio" ConnectionString="<%$ AppSettings:SQLConnection1 %>"
SelectCommand="uspSELECT_PROJECT"
SelectCommandType="StoredProcedure"
runat="server">
<SelectParameters>
<asp:QueryStringParameter Name="p_PORTFOLIOID" QueryStringField="portfolio" />
</SelectParameters>
</asp:SqlDataSource>
Thanks,
James
View 2 Replies
View Related
Jun 10, 2008
Hi, I am having a problem looking up querystrings in my DB, I have the following code
<asp:SqlDataSource ID="SqlData_products" runat="server" ConnectionString="<%$ ConnectionStrings:ProductDatabaseConnectionString2 %>" SelectCommand="SELECT * FROM [tbl_subProduct],[tbl_subCategory],[tbl_topCategory],[tbl_Material],[tbl_topLevelProduct] WHERE numSubCategoryID = @Category OR numMaterialID = @Material OR txtOrderCode = @Keyword OR txtMovexCode = @Keyword OR txtUKMapCode = @Keyword"> <selectparameters> <asp:QueryStringParameter Name="Category" QueryStringField="SearchCatString" /> <asp:QueryStringParameter Name="Material" QueryStringField="SearchMatString" /> <asp:QueryStringParameter Name="Keyword" QueryStringField="SearchKeyString" /> </selectparameters> </asp:SqlDataSource>
My Querystrings are in the VB file:- SearchCatString = Request.QueryString("txtSelCat")
SearchMatString = Request.QueryString("txtSelMat")
SearchKeyString = Request.QueryString("txtKeyword")These come from a previous page, where a dropdown list copies the ID of the selected item into a text box. My problem is that this is not working please help
View 1 Replies
View Related
Feb 19, 2007
I have a whole bunch of bit fields in an SQL data base, which makes it a little messy to report on.
I thought a nice idea would be to assigne a text string/null value to each bit field and concatenate all of them into a result.
This is the basic logic goes soemthing like this:
select case new_accountant = 1 then 'acct/' end +
case new_advisor = 1 then 'adv/' end +
case new_attorney = 1 then 'atty/' end as String
from new_database
The output would be
Null, acct/, adv/, atty, acct/adv/, acct/atty/... acct/adv/atty/
So far, nothing I have tried has worked.
Any ideas?
View 2 Replies
View Related
