Can We Reuse SqlParameter's?
Jul 10, 2004
Hi,
I am getting the following error:
The SqlParameter with ParameterName '@pk' is already contained by another SqlParameterCollection
If I could work out what code to post I would, but I can say that I am managing my Sql data in my code by caching small arrays of SqlParameter objects as pulled from the database. If I need to update the DB I change the cached SqlParameter and re-insert it. If I perform a SELECT I check the cache first to see if I already have the SqlParameter.
However, currently, I am experiencing the above error when performing a select, then later an update, followed by another update.
Would I be correct in saying that a SqlParameter object can only be used once for a database operation and should be discarded? Would I be correct if I said that the SqlCommand object should be discarded? I am barking up the wrong tree entirely?
Distressed in DBLand,
Matt.
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Jun 16, 2006
I'm using parameters to record into database like:
SqlParameter paramId_empresa = new SqlParameter("@Id_empresa", SqlDbType.Int, 4);
paramId_empresa.Value = idEmpresa;
myCommand.Parameters.Add(paramId_empresa);
And set sql server field to allow null values and default value as (null)
Trouble is I'm getting an Input string was not in a correct format. when the field is blank
Line 182:Line 183: myConnection.Open();Line 184: myCommand.ExecuteNonQuery();Line 185: myConnection.Close();Line 186: }
Thanks a lot for any help
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Jun 20, 2006
I am unable to set the value of my SqlParameter unless it is to a string.sqlCmd.Parameters.Add('@myParameter', SqlDbType.Bit).Value := false;
Setting it to false or 0 results in error: "Incompatible types: 'Object' and 'Boolean' (or 'Integer')"
I've tried to cast them as objects and that didn't work. I don't understand why something like 'false' (as a string) will.
FYI: I'm using Delphi.NET and hating it.
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Feb 13, 2007
Im trying to execute the following:mySqlCmd.Parameters.Add("@Parent_ID", SqlDbType.Int).Value = (sectionUpdate.iSection.ParentID == 0 ? DBNull.Value : myParentID); However i get an error that Null cant be converted to Int. Is there any way i can uyse the SqlParameters approach but pass in a Null value for the field or must i wrap the entire connection within a IF/ELSE statement one containing a hard-coded NULL within the query and the other as a standard parameter with a proper int value? Thanks
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Mar 26, 2007
Hi I am writing an app in flash which needs to hook up to MS SQL via asp.I need the code below to pass the var (ptodaysDate) to the sql statement. I can hard code it in and it works great but I really need to pass the var from flash.Pulling my hair out here, not much left to go.Any help greatly appreciated.---------------------------------------------- [WebMethod] public Schedule[] getSchedule(int ptodaysDate) { SqlDataAdapter adpt = new SqlDataAdapter("SELECT scheduleID, roomName, eventType,unitName,groupName,staffName,staffName2,theDate,theEnd FROM tb_schedule Where theDate >= @rtodaysDate", connString); SqlParameter rtodaysDate = new SqlParameter("@rtodaysDate", ptodaysDate); DataSet ds = new DataSet(); ArrayList al = new ArrayList(); adpt.Fill(ds); foreach (DataRow row in ds.Tables[0].Rows) { Schedule obj = new Schedule(); obj.scheduleID = (int)row["scheduleID"]; obj.roomName = (string)row["roomName"]; obj.eventType = (string)row["eventType"]; obj.unitName = (string)row["unitName"]; obj.groupName = (string)row["groupName"]; obj.staffName = (string)row["staffName"]; obj.staffName2 = (string)row["staffName2"]; obj.theDate = (string)row["theDate"]; obj.theEnd = (string)row["theEnd"]; al.Add(obj); } Schedule[] outArray = (Schedule[])al.ToArray(typeof(Schedule)); return outArray; } public class Schedule { public int scheduleID; public string roomName; public string eventType; public string unitName; public string groupName; public string staffName; public string staffName2; public string theDate; public string theEnd; }
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Feb 21, 2008
The FULL System.Data.SqlDbType reference seems unnecessary? Is there something I am doing wrong or something that should be added to Web.Config? If I try ONLY ",SqlDbType," it will not compile?
MY CODE: SqlParameter AName;
AName = myCommand.Parameters.Add("@AName",System.Data.SqlDbType.VarChar,50);
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Aug 5, 2004
Is it possible to have a SqlParameter setup as an Output, and get it to return @@Identity without using a stored procedure?
I have an INSERT statement, written as TEXT in my code (at the time being, I cannot create stored procedures). I'm trying to find out how to return the created IDENTITY that was generated.
Can someone please explain to me how this works?
Thanks.
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Nov 28, 2007
hi
I am creating a stroed procedure which suppose to update an image column of the given row. I have created the same procedures before which worked fine with texts and numbers but not with Images.
this procedure get table name,row Id, column name of the image, and image data. like:
Create PROCEDURE [dbo].[spImageUpd]
(
@TableName varchar(100),
@Id int,
@ImageColName nvarchar(100),
@ImageData image
)
begin
??????
end
I tryed to use
set @sql='update '+ @TableName+ ' set '+@ImageColName + '=' + @ImageDt' + ' where Id='+ cast(@Id as nvarchar(10))
EXEC sp_executesql
@query = @sql,
@params = N'@ImageDt">N'@ImageDt Image',
@ImageDt = @ImageData
but sp_executesql just accept text as params. is it possible to fix this problem?
thank you in advance
regards
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Aug 2, 2006
I am just learning ASP.net, been reading over data grids but I am having a tough time understanding what the parameter line would be used for. I have read the MSDN regarding parameters, they seem to make sense. But the whole System.Byte(0) I cannot understand.
sqlUpdateCommand1 = new SqlCommand();
sqlUpdateCommand1.Parameters.Add(new SqlParameter("@Original_SSN", SqlDbType.VarChar, 11, ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "SSN", DataRowVersion.Original, null));
Any pointers or tutorials regarding this is much appreciated.
Thanks,
Rishi Dhupar
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Feb 6, 2005
Below I have pasted the error message, hidden form fields, function code and even the stored procedure code. I'd be most grateful if anyone can show me the error of my ways!
Thanks,
theSpike
I'm calling a stored procedure and besides several varchar fields, I'm passing two integer values (employeeID and businessID). These values come from hidden fields on a form and it's the businessID that throws the format error. I call the same stored procedure for both insert and update (the SP evaluates employeeID to decide btwn insert/update) and the insert works perfectly, but the update throws the format exception error. The only difference is that the employeeID is 0 (zero) for an insert and > 0 when it's updating. I strikes me as particularly bizzare that the line that throws the exception is the businessID, not the employeeID because the businessID is the same value for both insert and update. It's the employeeID that is subject to change.
The error:
Exception Details: System.FormatException: Input string was not in a correct format.
Source Error:
Line 147: //businessID
Line 148: SqlParameter businessID = new SqlParameter("@businessID",SqlDbType.Int,4);
Line 149: businessID.Value = Convert.ToInt32(hdnBusinessID.Value);
Line 150: businessID.Direction = ParameterDirection.Input;
Line 151: theCommand.Parameters.Add(businessID);
I'm calling the SAME function for the insert and update, the same hiddent form fields exist
<input name="hdnBusinessID" id="hdnBusinessID" type="hidden" value="1" />
<input name="hdnEmployeeID" id="hdnEmployeeID" type="hidden" value="7" />
Here's the function that get's called:
void btnAddEmployee_Click(object sender, EventArgs e) {
int intNewEmployeeID;
string connectionstring = ConfigurationSettings.AppSettings["ConnectionString"];
SqlCommand theCommand = new SqlCommand();
theCommand.CommandText = "AMS_EmployeeSave";
theCommand.Connection = new SqlConnection(connectionstring);
theCommand.CommandType = CommandType.StoredProcedure;
// Add parameters to SqlCommand
//employeeID
SqlParameter empID = new SqlParameter("@employeeID",SqlDbType.Int,4);
empID.Value = Convert.ToInt32(hdnEmployeeID.Value);
empID.Direction = ParameterDirection.Input;
theCommand.Parameters.Add(empID);
//businessID
SqlParameter businessID = new SqlParameter("@businessID",SqlDbType.Int,4);
businessID.Value = Convert.ToInt32(hdnBusinessID.Value);
businessID.Direction = ParameterDirection.Input;
theCommand.Parameters.Add(businessID);
//title
SqlParameter title = new SqlParameter("@title",SqlDbType.Char,5);
title.Value = txtTitle.Text.ToString();
title.Direction = ParameterDirection.Input;
theCommand.Parameters.Add(title);
//firstname
SqlParameter firstName = new SqlParameter("@firstName",SqlDbType.VarChar,25);
firstName.Value = txtFirstName.Text.ToString();
firstName.Direction = ParameterDirection.Input;
theCommand.Parameters.Add(firstName);
//middleName
SqlParameter middleName = new SqlParameter("@middleName",SqlDbType.VarChar,15);
middleName.Value = txtMiddleName.Text.ToString();
middleName.Direction = ParameterDirection.Input;
theCommand.Parameters.Add(middleName);
//LastName
SqlParameter lastName = new SqlParameter("@lastName",SqlDbType.VarChar,25);
lastName.Value = txtLastName.Text.ToString();
lastName.Direction = ParameterDirection.Input;
theCommand.Parameters.Add(lastName);
//suffix
SqlParameter suffix = new SqlParameter("@suffix",SqlDbType.Char,5);
suffix.Value = txtSuffix.Text.ToString();
suffix.Direction = ParameterDirection.Input;
theCommand.Parameters.Add(suffix);
//email
SqlParameter email = new SqlParameter("@email",SqlDbType.VarChar,80);
email.Value = txtEmail.Text.ToString();
email.Direction = ParameterDirection.Input;
theCommand.Parameters.Add(email);
//password
SqlParameter password = new SqlParameter("@password",SqlDbType.Char,20);
password.Value = txtPassword.Text.ToString();
password.Direction = ParameterDirection.Input;
theCommand.Parameters.Add(password);
//newEmployeeID output parameter
SqlParameter newEmployeeID = new SqlParameter("@newEmployeeID",SqlDbType.Int,4);
newEmployeeID.Direction = ParameterDirection.Output;
theCommand.Parameters.Add(newEmployeeID);
theCommand.Connection.Open();
theCommand.ExecuteNonQuery();
intNewEmployeeID = Convert.ToInt16(theCommand.Parameters["@newEmployeeID"].Value);
theCommand.Connection.Close();
if(intNewEmployeeID == -1){
lblSaveResult.Text = "There was a problem saving the employee information";
}
else if(hdnEmployeeID.Value == "0"){
lblSaveResult.Text = "New employee successfully added";
}
else{
lblSaveResult.Text = "Employee successfully updated";
}
lblSaveResult.Visible = true;
}
STORED PROCEDURE
CREATE PROCEDURE [dbo].[xxxx]
(@employeeID int,
@businessID int,
@title char(5),
@firstName varchar(25),
@middleName varchar(15),
@lastName varchar(25),
@suffix char(5),
@email varchar(80),
@password char(20),
@newEmployeeID int output)
AS
declare @alreadyExists int
-- passed in ID = 0 means they're adding a new employee so do insert
if @employeeID = 0
begin
select @alreadyExists = count(*) from dbo.AMS_employee where emp_email = @email
if @alreadyExists = 0
begin
insert into AMS_employee (emp_businessID, emp_title, emp_firstName, emp_middleName, emp_lastName, emp_suffix, emp_email, emp_password)
values (@businessID, @title, @firstName, @middleName, @lastName, @suffix, @email, @password)
select @newEmployeeID = @@identity
end
else -- there is already an employee with that email address
select @newEmployeeID = -1
end
-- passed in ID > 0 means they're updating existing employee so do update
else if @employeeID > 0
begin
update AMS_employee set
emp_title = @title,
emp_firstName = @firstName,
emp_middleName = @middleName,
emp_lastName = @lastName,
emp_suffix = @suffix,
emp_email = @email
where emp_ID = @employeeID
select @newEmployeeID = @employeeID
-- only update the password if it one was provided
if len(rtrim(@password)) > 0
begin
update AMS_employee set emp_password = @password where emp_ID = @employeeID
end
end
GO
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Mar 29, 2007
Hi,
i don't know if this is the right forum to post to, but here i go:
I'm having a problem...
I need to delete several records having as criteria their pk.
The deletion is made using SqlParameter in the code and a stored procedure on server.
as far as i know, i can do this, either using a IN list:
- build and pass the list of id's from code to the sp:
delete from tbl where attachment.id in (1,2,3)
OR
- execute a simple delete several times.
So far i tried first option, but i get errors in converting the list to ints; that is what the sql engine says.
I prefer this option because i think is faster and requires less roundtrips to the sql server.
My questions are:
1. how do i build a sane IN list?
2. is it worth to use a delete in a loop? the records that must be deleted are 5 at most, per job.
1 job can have [0..5] attachments.
Thank you,
Daniel
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Aug 2, 2006
We've got an app that is in final testing so we can't go around forcing SqlDbType.VarChar. Is there any way to make SqlParameter default to varchar if you don't explicitly set a type for a string value? It's bad for our db index usage because they're all varchar and nvarchar forces a convert_implicit messing up performance.
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Mar 23, 2007
Stored procedure:1 ALTER PROCEDURE [dbo].[insert_DagVerslag]
2 -- Add the parameters for the stored procedure here
3 @serverID int,
4 @datum datetime,
5 @ID int OUTPUT
6 AS
7 BEGIN
8 -- SET NOCOUNT ON added to prevent extra result sets from
9 -- interfering with SELECT statements.
10 SET NOCOUNT ON;
11 -- Insert statements for procedure here
12 BEGIN TRANSACTION
13 INSERT Log ( serverID, datum)
14 VALUES( @serverID, @datum)
15 COMMIT TRANSACTION
16 SET @ID = @@identity
17 END
18
Method who is calling the stored procedure and causes the error1 public void AddDagVerslag(Historiek historiek)
2 {
3 SqlConnection oConn = new SqlConnection(_connectionString);
4 string strSql = "insert_DagVerslag";
5 SqlCommand oCmd = new SqlCommand(strSql, oConn);
6 oCmd.CommandType = CommandType.StoredProcedure;
7 oCmd.Parameters.Add(new SqlParameter("@serverID", SqlDbType.Int)).Value = historiek.ServerID;
8 oCmd.Parameters.Add(new SqlParameter("@datum", SqlDbType.DateTime)).Value = historiek.Datum;
9 oCmd.Parameters.Add(new SqlParameter("@ID", SqlDbType.Int));
10
11 oCmd.Parameters["@ID"].Direction = ParameterDirection.Output;
12
13 try
14 {
15 oConn.Open();
16 int rowsAffected = oCmd.ExecuteNonQuery();
17 if (rowsAffected == 0) throw new ApplicationException("Fout toevoegen historiek");
18 oCmd.Parameters.Clear();
19 historiek.HistoriekID = System.Convert.ToInt32(oCmd.Parameters["@ID"].Value);
20
21 foreach (HistoriekDetail hDetail in historiek.LstHistoriekDetails)
22 {
23 AddDagVerslagCategorie(historiek.HistoriekID, hDetail);
24 }
25 }
26 catch (Exception ex)
27 {
28 throw new ApplicationException("Fout toevoegen historiek : " + ex.Message);
29 }
30 finally
31 {
32 if (oConn.State == ConnectionState.Open) oConn.Close();
33 }
34 }
Whats going wrong, i've added the ID parameter my ParameterCollection... so why cant it be found
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Sep 19, 2007
Hello All,
I'm having a problem tracking down why my app is not instantiating a parameter in a sqldatasource, when I'm expecting it to do so.
When the app fails, this info is displayed:
Server Error in '/' Application.--------------------------------------------------------------------------------
An SqlParameter with ParameterName @createdby is not contained by this SqlParameterCollection. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.IndexOutOfRangeException: An SqlParameter with ParameterName @createdby is not contained by this SqlParameterCollection.
Source Error:
Line 30: Private Sub SqlDataSource1_Deleting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceCommandEventArgs) Handles SqlDataSource1.DeletingLine 31: e.Command.Parameters.Item("@createdby").Value = CType(Membership.GetUser.ProviderUserKey, Guid)Line 32: Line 33: End Sub
Source File: ...filename... Line: 31
Stack Trace:
[IndexOutOfRangeException: An SqlParameter with ParameterName @createdby is not contained by this SqlParameterCollection.] System.Data.SqlClient.SqlParameterCollection.GetParameter(String parameterName) +713105 System.Data.Common.DbParameterCollection.get_Item(String parameterName) +7 diabetes.reading.SqlDataSource1_Deleting(Object sender, SqlDataSourceCommandEventArgs e) in C:Documents and SettingsAlbertMy DocumentsVisual Studio 2005Projectsdiabetesdiabetesdiabetes
eading.aspx.vb:31 System.Web.UI.WebControls.SqlDataSourceView.OnDeleting(SqlDataSourceCommandEventArgs e) +114 System.Web.UI.WebControls.SqlDataSourceView.ExecuteDelete(IDictionary keys, IDictionary oldValues) +682 System.Web.UI.DataSourceView.Delete(IDictionary keys, IDictionary oldValues, DataSourceViewOperationCallback callback) +75 System.Web.UI.WebControls.FormView.HandleDelete(String commandArg) +839 System.Web.UI.WebControls.FormView.HandleEvent(EventArgs e, Boolean causesValidation, String validationGroup) +556 System.Web.UI.WebControls.FormView.OnBubbleEvent(Object source, EventArgs e) +95 System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +35 System.Web.UI.WebControls.FormViewRow.OnBubbleEvent(Object source, EventArgs e) +109 System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +35 System.Web.UI.WebControls.LinkButton.OnCommand(CommandEventArgs e) +115 System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) +163 System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +174 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102
Here's the datasource:
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:DiabetesOne %>" DeleteCommand="reading_delete" DeleteCommandType="StoredProcedure" > <DeleteParameters> <asp:Parameter Direction="ReturnValue" Name="RETURN_VALUE" Type="Int32" /> <asp:Parameter Name="rid" Type="Int32" /> <asp:Parameter Name="createdby" Type="Object" /> </DeleteParameters> </asp:SqlDataSource>
Here's the beginning of the stored procedure showing the parameters:
CREATE PROCEDURE [dbo].[reading_delete] @rid int,@createdby sql_variantASset nocount on;begin try...the procedural code...
Here's debugger capture, pointing to same issue:
System.IndexOutOfRangeException was unhandled by user code Message="An SqlParameter with ParameterName @createdby is not contained by this SqlParameterCollection." Source="System.Data" StackTrace: at System.Data.SqlClient.SqlParameterCollection.GetParameter(String parameterName) at System.Data.Common.DbParameterCollection.get_Item(String parameterName) at diabetes.reading.SqlDataSource1_Deleting(Object sender, SqlDataSourceCommandEventArgs e) in C:... at System.Web.UI.WebControls.SqlDataSourceView.OnDeleting(SqlDataSourceCommandEventArgs e) at System.Web.UI.WebControls.SqlDataSourceView.ExecuteDelete(IDictionary keys, IDictionary oldValues) at System.Web.UI.DataSourceView.Delete(IDictionary keys, IDictionary oldValues, DataSourceViewOperationCallback callback)
I've inspected the sqldatasourcecommandeventargs command.parameters in the deleting method during debugging and could not find the parameter in the array, although I "think" it should be because it's explicitly stated in the sqldatasource parameters declarations. I see two parameters in the array, @RETURN_VALUE and @RID, both of which are expected and coincide with the declaration in the stored procedure and the sqldatasource.
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Apr 30, 2007
Dear Folks,
I'm getting the error with application like this..............
"the transaction log for database "mydatabase" is full.....to find out why space in the log can not be reused, see the log_reuse_wait_desc column in sys databases. "
I've checked with the column, there are totally 3 options.(I've checked with all other databases)
1)checkpoint,
2)log_backup,
3)nothing
what can i choose for this error to be suppressed?
actually there was log_backup option.
please guide me in this regard.........
thanks in advace.
Vinod
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Mar 27, 2007
Hi,What I am trying to do is to get the new ID for every record is inserted into a table. I have a For...Each statement that does the loop and using the sqldatasource to so the insert. <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ myConnectionString%>">
<InsertParameters>
<asp:Parameter Name="NewID" Type="int16" Direction="output" />
</InsertParameters>
</asp:SqlDataSource> Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim sqlSelect As String
Session("Waste_Profile_Num") = 2
Session("Waste_Profile_Num2") = 5
sqlSelect = "SELECT Range, Concentration, Component_ID FROM Component_Profile WHERE (Waste_Profile_Num = " & Session("Waste_Profile_Num").ToString() & ")"
SqlDataSource1.SelectCommand = sqlSelect
Dim dv As Data.DataView = CType(SqlDataSource1.Select(DataSourceSelectArguments.Empty), Data.DataView)
For Each dr As Data.DataRow In dv.Table.Rows
sqlSelect = "INSERT INTO Component_Profile (Waste_Profile_Num, Range, Concentration, Component_ID) "
sqlSelect &= "VALUES (" & Session("Waste_Profile_Num2").ToString() & ", @Range, @Concentration, @Component_ID); SELECT @NewID = @@Identity"
SqlDataSource1.InsertCommand = sqlSelect
'SqlDataSource1.InsertParameters.Add("Waste_Profile_Num", Session("Waste_Profile_Num2").ToString())
SqlDataSource1.InsertParameters.Add("Range", dr("Range").ToString())
SqlDataSource1.InsertParameters.Add("Concentration", dr("Concentration").ToString())
SqlDataSource1.InsertParameters.Add("Component_ID", dr("Component_ID").ToString())
SqlDataSource1.Insert()
SqlDataSource1.InsertParameters.Clear()
MsgBox(Session("NewID").ToString())
Next
End Sub
Protected Sub SqlDataSource1_Inserted(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceStatusEventArgs) Handles SqlDataSource1.Inserted
Session("NewID") = e.Command.Parameters("@NewID").Value.ToString
End Sub What I have done so far is to display the new id and I am going to use that return id later. However, the first time through the loop, I am able to get the new id but not the second time. So, I wonder, how do I every single new id each time the INSERT statement is executed?STAN
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Apr 25, 2007
It's a pretty basic question but I haven't been able to find any examples out there. I dimmed a dataadapter and would like to reuse later in my code (line 3 in the code below). What is the correct syntax to do this? Dim da As New SqlDataAdapter("SELECT * FROM myTable", conn)da.Fill(myDataTable)da.______ ("SELECT * FROM myTable2", conn)da.Fill(myDataTable2)
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May 1, 2006
I can create a SqlCacheDependency, and link it to a cached item in httpcontext cache. When something change, it will remove the cached item from the cache. I think I have to redo the process when that happens - prepare sql command, create SqlCacheDependency and insert the item into cache. Now I only need a notification from my SQL when something changes in one of my table, I don;t need read anything from db, and I think I should find a way to not recreate the SqlCacheDependency object everytime?
any suggestion?
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Dec 15, 2007
Hello, Can I reuse the deleted primary key id? I'm using SQLServer2005. cheers,imperialx
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Nov 14, 2006
What is the best code pratice to use do the following code,
SELECT
fo.no as LNum,
fo.name as LName,
sum(CASE fo.docnome WHEN "In" THEN fo.etotal ELSE 0 END) as In1,
sum(CASE fo.docnome WHEN "In2" THEN fo.etotal ELSE 0 END) as In2,
sum(In1+In2)/10 as inDec,
from fo group by fo.no,fo.name order by fo.name
instead of
SELECT
fo.no as LNum,
fo.name as LName,
sum(CASE fo.docnome WHEN "In" THEN fo.etotal ELSE 0 END) as In1,
sum(CASE fo.docnome WHEN "In2" THEN fo.etotal ELSE 0 END) as In2,
((sum(CASE fo.docnome WHEN "In" THEN fo.etotal ELSE 0 END))+sum(CASE fo.docnome WHEN "In2" THEN fo.etotal ELSE 0 END)))/10 as inDec,
from fo group by fo.no,fo.name order by fo.name
I cant use functions and procedures. Is there any better and cleaner way to code this, reusing the calculated values?
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Jul 23, 2005
I wonder if there is a solution for this in SQL 2000 (or do I have towait for SQL 2005)?I am currently in the middle of developing a 'Yahoo' style portal whichwill be rolled out in about 20 or so countries. I have set up in SQLServer one database per country. All the portals have the samefunctionality - but show different data.Is it possible to have a single database which holds storedproceedures, functions and views and have the individual countrydatabases use these?Note: I want to avoid using EXEC sp_executesql.I look forward to some good news on this! Thank you in advance.Dadou.
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Apr 19, 2008
Hi. I'm starting to try out LINQ to SQL, and so I'm using SQL Express (on Vista) to experiment. My problem is that once I create and delete a database, I can never use the name again. If, after deleting the old database, I try to create another one with the same name (say Acct1), I get "Create failed for Database 'Acct1'. An exception occurred while executing a Transact-SQL statement or batch. The logical file name "Acct1" is already in use. Choose a different name. Error: 1828"
I am trying to create the database in SQL Server Management Studio Express. That database name does not appear in the list of databases: there is only AdventureWorks and the system databases. The .MDF and .LDF files have been deleted. Not just sent to the recycle bin, but permanently deleted.
I have already used up Acct1, Acct2, and Acct3, just to try out different scenarios. Each time, I delete the old database before trying to create a new one with the same name, but I am forced to always supply a new, different name. I have checked the directory with hidden files and system files showing to be sure there is no old file lurking there somewhere.
Is there a way to delete these old "logical file names"? I can't even find any reference to their existence except for the message that says they are already in use.
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Jul 29, 2015
with c1 As (
select 1 As '1' , 2 As '2' , 3 As '3'
)
, c2 As (
select 4 As '4', 5 As '5', 6 As '6'
union all
select 1 , 2 ,3 from c1 -- >>>>> select from c1 here
) select * from c2
union all
select * from c1 -- >>>>>> and select from c1 here
According to the query above , I try to reuse the subquery by put the subquery into 'with cte' name (c1) then i select this 2 times .
if I do this way , how many time this subquery (c1) execute ?
if 1 time then this is the right way to reuse this subquery .
if 2 times , it is not then what should i do to reuse this subquery ?
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Nov 26, 2007
I have read the articles posted online concerning different dialog reuse strategies. Most of them create a new table in the sender to hold dialog ids. I was wondering what is wrong, if anything, with the following approach:
Code Block
declare @dlg uniqueidentifier
select top 1 @dlg = conversation_handle from sys.conversation_endpoints where state IN ('CO')
if @dlg is null
begin
begin dialog conversation @dlg
from service [tcp://SFT3DEVSQL01:4022/TyMetrix360Audit/DataSender]
to service '//TyMetrix360Audit/DataWriter','386DDD04-7E55-466A-BE83-37EFC20910B9'
on contract [//TyMetrix360Audit/Contract] with encryption = off;
end
;send on conversation @dlg
message type [//TyMetrix360Audit/Message] (@msg)
Here I simply select a conversation handle directly from the sys.conversation_endpoints table. Can anyone see any issues with this approach?
Thanks in advance....
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Jan 3, 2007
I have been working with SQL for quiet a while but think this perhaps is a very basic question that has always escaped me:
At my work I was exposed to both, MS SQL Server 2000 and Sybase Adaptive Server Anywhere/Sybase SQL Anywhere.
Under Sybase I was able to use aliases in other calculations and filters but i have never been able to do the same with SQL.
Example:
In Sybase I can write this:
Select Price * Units as Cost Cost * SalesTax as TotalTaxFrom Invoice Where TotalTax > 3.5
However if i want to do this in MS SQL 2000 i have to go trough
Select
Price * Units as Cost
Price * Units * SalesTax as TotalTax
From Invoice
Where (Price * Units * SalesTax) > 3.5
In the long run this is costing me a lot of code redundancy, not to mention a debugging nightmare. Is there a way to replicate this alias usage in MS SQL Server?
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Jun 5, 2007
I am working on a project developing a fairly large number of reports with a team of developers. Many of these reports have common elements and code, such as common headers with user-selectable colors. Additionally, many of the common parts of the reports are at mockup stage currently, and many features will have to be added to the reports as time goes on.
We're attempting to create a generalized framework that will minimize the duplication of effort as we develop these reports, and as we go back and modify or fix them later.
What is the best way to approach this?
My first attempt was to create a report template and base all the reports off of the same template. That was fine for the first pass, but as we need to make changes later, they will not be propagated to the already existing reports.
My second attempt was to have each componant of that template reference a subreport, so that changes to the actual report template will be minimized as we go forward. This works great for minimizeing work, but it appears that you lose many features with the use of subreports, and there seems to be a pretty serious performance impact as well. I have posted about one such issue here: Pagination
If anyone has pointers about how to go about this, and where I should start, they would be greatly apreciated!
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Mar 18, 2007
Error 2 'Text' is not a member of 'System.Data.SqlClient.SqlParameter'. I think this error has something to do with the lack of an Import command, anyone point me in the right direction?
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May 19, 2008
Dear All,
I have a problem while trying to update the content of my page to the database by the means of a stored procedure
string OcompConnection = ConfigurationManager.ConnectionStrings["GenUserCode"].ConnectionString;
System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(OcompConnection);
System.Data.SqlClient.SqlCommand ocmd = new System.Data.SqlClient.SqlCommand("Dealer_Insert", conn);ocmd.CommandType = CommandType.StoredProcedure;
ocmd.Parameters.Add(new SqlParameter("@UserCode"), SqlDbType.NVarChar);
ocmd.Parameters["@UserCode"] = TxtUserCode;
and also there is another error message saying that argument1: can not comvert from system.data.sqlclient.sqlparameter to string.
What am i Missing???
Eventually there is the try{open} and finally{close}
Many Thanks
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Jun 19, 2014
I have a table in which there is a column of type identity(1,1),in the same table i have bulk data, and i have deleted a row from my table, so now i want to reuse that same Id again, how to do that.
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Mar 4, 2008
Hello,
I have an ID column which is an Identity column, and it counts from 1 upwards.
If I have 10 records, I have ID's number 1 to 10.
If I then add another record, it will give the ID number 11.
Imagine I then delete ID number 9
Is it possible to get the next record I create to take number 9 instead of 12 ?
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Feb 7, 2006
Hello
I have some common functions that i use in several script tasks. How du i store a function globaly so that i can use it from different projects and still only have to edit it one place ?
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Jun 12, 2007
I have several stage to star (i.e. moving data from a staging table through the key lookups into a fact table) ETL transformations in a single SSIS package. Each fact table has a different set of measures but the identical foreign key set, e.g. ConsultantKey, SubsidiaryKey, ContestKey, ContestParamKey and MonthKey.
Currently I have to replicate the key lookup (Surrogate Key Pipeline, or SKP) for each data flow. If I could cache each dimension one time in the package and reuse it for each stage to fact it would be much more efficient.
Is there a way for me to reuse a common data flow?
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Jan 25, 2008
I've added a typed DataSet and dragged a table across from the server explorer. When I click configure on the table adapter, then click previous back to the "Choose Your Data Connection" dialog. The only option is the new connection that was just created when I added the sql server to the server explorer. Is there anyway to reuse my existing web.config connection string? My goal is to have a single connection string in my web.config.
Thanks.
-David
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