Variable In A Select Statement
Sep 6, 2006Is there anyway to use a variable to define a column in a select statement. I can put the variable in but I'm sure it will be read as a literal instead of the column.
select @column_name from table
Is there anyway to use a variable to define a column in a select statement. I can put the variable in but I'm sure it will be read as a literal instead of the column.
select @column_name from table
I am trying to set a vaiable from a select statement
DECLARE @VALUE_KEEP NVARCHAR(120),
@COLUMN_NAME NVARCHAR(120)
SET @COLUMN_NAME = (SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'CONTACTS' AND COLUMN_NAME = 'FIRSTNAME')
SET @VALUE_KEEP = (SELECT @COLUMN_NAME FROM CONTACTS WHERE CONTACT_ID = 3)
PRINT @VALUE_KEEP
PRINT @COLUMN_NAME
RESULTS
-------------------------------------------------------------------------------------------
FirstName <-----------@VALUE_KEEP
FirstName <-----------@COLUMN_NAME
SELECT @COLUMN_NAME FROM CONTACTS returns: FirstName
SELECT FirstName from Contacts returns: Brent
How do I make this select statement work using the @COLUMN_NAME variable?
Any help greatly appreciated!
Hi,I'm trying to dynamically assign the table name for a SELECT statement but can't get it to work. Given below is my code: SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE GetLastProjectNumber (@DeptCode varchar(20))
AS
BEGIN TRANSACTION
SET NOCOUNT ON
DECLARE @ProjectNumber int
SET @ProjectNumber = 'ProjectNumber' + REPLACE(CONVERT(char,@DeptCode),'.','')
SELECT MAX(@ProjectNumber)
FROM 'tbl_ProjectNumber' + REPLACE(CONVERT(char,@DeptCode),'.','');
END TRANSACTION Basically, I have a bunch of tables which were created dynamically using the code from this post and now I need to access the last row in a table that matches the supplied DeptCode. This is the error I get:Msg 102, Level 15, State 1, Procedure GetLastProjectNumber, Line 29Incorrect syntax near 'tbl_ProjectNumber'. Any help would be appreciated.Thanks.
I have a stored procedure that accepts the table name as a parameter. Is there anyway I can use this variable in my select statement after the 'from' clause. ie "select count(*) from @Table_Name"?
When I try that is says "Must declare the table variable @Table_Name". Thanks!
I'm trying to add a 'change password' control to my site and seem to be having some issues. I have code that works if I statically define what user is displayed on the form, but I cant get it to detect the 'authenticated' user and show them the reset for for that ID.If I take the "+ myid" out of the select statement and just define the username statically the form works properly. Error:System.Data.SqlClient.SqlException: The column prefix
'System.Security.Principal' does not match with a table name or alias name used
in the query. Here's a piece of the code that is supposed to detect the current logged in user. However, it gives the error. (some of the code may be redundant but its not causing issues that I can tell) public void InitPage() { IPrincipal p = HttpContext.Current.User; String myid = HttpContext.Current.User.ToString(); SqlServer sqlServer = new SqlServer(Util.SqlConnectionString()); DataTable dt; SqlConnection cnn = new SqlConnection(ConfigurationManager.ConnectionStrings["myconnection"].ConnectionString); SqlDataAdapter cmd1 = new SqlDataAdapter("select * from USER WHERE USER_NAME = "+ myid, cnn); DataTable UIDtable = new DataTable(); cmd1.Fill(UIDtable); User_Id.Value = UIDtable.Rows[0]["ID"].ToString(); dt = sqlServer.USER_SELECT(Util.SiteURL(Request.QueryString["Pg"].ToString()), User_Id.Value);
this querry below works perfect when i assign the us.UserID = 29 but i need to be able to use the @UsersMaxID variable..... when i debug all of my values are right where they need to be... even this on ((( @UsersMaxID ))) but for some reason it will not work with the next select statement...
can someone make the pain go away and help me here..??
erik..
GOSET ANSI_NULLS ON GO
ALTER PROCEDURE AA
ASDECLARE @GenericColumn Varchar (200) DECLARE @GenericValue Varchar (200)
SET @GenericColumn = 'FirstName'SET @GenericValue = 'Erik'
DECLARE @SQL NVARCHAR(4000) DECLARE @UserID INT DECLARE @UsersMaxID INT DECLARE @MaxID INT
declare @tempResult varchar (1000)
-------------------------------------------Define the #Temporary Table----------------------------------------------CREATE TABLE #UsersTempTable ( ID int IDENTITY PRIMARY KEY,
UserID [int], FirstName [varchar](30), LastName [varchar](30), CompanyName [varchar](200), Address1 [varchar](75), Address2 [varchar](75), City [varchar](75),ActiveInd [int], Zip [varchar](10), WkPhone [varchar](12),HmPhone [varchar](12), Fax [varchar](12), Email [varchar](200), Website [varchar](200), UserType [varchar](20),Title [varchar](100),Note [text], StateCD [char](2), CountryCD [char](2), CompanyPhoto [varchar](50), CompanyDescr [varchar](2000)) ---------------------------------------Fill the temp table with the Customers data-----------------------------------SET @SQL = 'INSERT INTO #UsersTempTable (UserID, FirstName, LastName, CompanyName, Address1, Address2, City, ActiveInd, Zip, WkPhone, HmPhone,Fax, Email, Website, UserType, Title, Note, StateCD, CountryCD, CompanyPhoto, CompanyDescr)
Select Users.UserID, Users.FirstName,Users.LastName, Users.CompanyName, Users.Address1, Users.Address2, Users.City, Users.ActiveInd, Users.Zip, Users.WkPhone, Users.HmPhone,Users.Fax,Users.Email,Users.Website, Users.UserType,Users.Title, Users.Note,Users.StateCD, Users.CountryCD,Users.CompanyPhoto,Users.CompanyDescr
FROM USERS
WHERE ' + @GenericColumn +' = ''' + @GenericValue + ''''
EXEC sp_executesql @SQL
SET @MaxID = (SELECT MAX(ID) FROM #UsersTempTable)SET @UsersMaxID = (SELECT UserID From #UsersTempTable WHERE ID = @MaxID)
SELECT SpecialtyName FROM Specialty s INNER JOIN UserSpecialty us ON s.SpecialtyCD = us.SpecialtyCD WHERE us.UserID = 29
SELECT * FROM #UsersTempTable
==========================================================================================SET @UsersMaxID = (SELECT UserID From #UsersTempTable WHERE ID = @MaxID)
SELECT SpecialtyName FROM Specialty s INNER JOIN UserSpecialty us ON s.SpecialtyCD = us.SpecialtyCD WHERE us.UserID = 29 <<<<<<<<<<<<<<<<< i need @UserMaxID ........RIGHT HERE
I have a table 'table_list' which contains two columns, table_name and a record_count. This table stores a list of tables and their corresponding record counts.
What I am trying to do is, to be able to write a select statement, that can read each table name in the 'table_name' column, execute a select count(*) for the same, and update its record_count with the result of select count(*).
This is the code in my procedure..
DECLARE @tab_list CURSOR
set @tab_list = CURSOR FOR select * from table_list
OPEN @tab_list
DECLARE @tab_name varchar(256)
DECLARE @rec_cnt int
FETCH NEXT FROM @tab_list INTO @tab_name, @rec_cnt
select count(*) from @tab_name
This select is looping around along with FETCH till all the table names are exhausted and their counts are updated from the cursor back into the table.
Problem is that, I am not able to use select count(*) from @tab_name, and its not accepting a variable there.
Please help me to construct the select statement that is similiar to
x=<table name>
select * from x
where x is a variable and the table name gets substituted.
what is the syntax for it ?
How do I use a variable to specify the column name in a select statement?
declare @columnName <type>
set @columnName='ID'
select @columnName from Table1
Is it possible to add a variable in SSIS like
name of variable: myVar
Scope: Data Flow Task
Data Type: String
Value:SELECT hello FROM blah WHERE (azerty = @[User::pda]) AND (qwerty = @[User::phone])
@[User::pda] and @[User::phone] are also variables in SSIS just like the myVar I made
I know I'm doing something wrong with the data type because it's stores the whole select statement as a string
Help
Worf
Example:
Select icount + 1 as icount from table
or
Select counter() as icount from table
The above is wrong ...just a sample to show what I am trying to accomplish.
Is there a function in SQL statement? Thanks.
hey all,
I have the following query:
ALTER PROCEDURE [dbo].[sp_SelectMostRecentArticle]
AS
BEGIN
DECLARE @article_id INT
SELECT @article_id = (
SELECT TOP 1 article_id
FROM article
ORDER BY article_id DESC
)
DECLARE @comment_count INT
SELECT @comment_count = (
SELECT COUNT(comment_id)
FROM comment
JOIN article ON article_id = comment_article_id
GROUP BY article_id
HAVING article_id = @article_id
)
SELECT TOP 1 article_id, article_author_id,
article_title, article_body, article_post_date,
article_edit_date, article_status, article_author_id
article_author_ip, author_display_name,
category_id, category_name--, comment_count AS @comment_count
FROM article
JOIN author ON author_id = article_author_id
JOIN category ON category_id = article_category_id
GROUP BY article_id, article_title, article_body, article_post_date,
article_edit_date, article_status, article_author_ip,article_author_id,
author_display_name, category_id, category_name
HAVING article_id = @article_id
END
GO
as you can see, im trying to return a comment_count value, but the only way I can do this is by defining the variable.
I have had to do it this way, because I cannot say COUNT(comment.comment_id) AS comment_count or it returns an error that it cant reference the comment.comment_id.
But when change it to FROM article, comment; I get errors about the article_author_id and article_comment_id.
And i cant add a join, because it would return the amount of rows of the comment...
unless someone could help with what i Just decribed (as i would prefer to do it this way), how would i return the variable value as part of the select statement?
Cheers
I am trying to figure out a way to retrieve a field value and assign it to a local variable with out destroying the whole structure of my T-SQL statement.
Here is the code:
DECLARE @AVERAGE_WHOLESALE_PRICE VARCHAR(20)
DECLARE @ORDERBY VARCHAR(20)
SELECT TOP 1 @AVERAGE_WHOLESALE_PRICE = P.NPT_PRICEX,
CASE NPT_TYPE
WHEN '07' THEN 1
WHEN '09' THEN 2
[Code] ....
The error message is
Msg 141, Level 15, State 1, Line 3
A SELECT statement that assigns a value to a variable must not be combined with data-retrieval operations.
How to modify this statement?
I'm new to sql stored procedures but I would like to store the results
of an sql statement in a variable such as:
SET @value = select max(price) from product
but this does not work, can someone tell me how I would go
about in storing the results in a variable.
@value is declared as int
Thanks in advance,
Sharp_At_C
I have concatenated a long Select Statement and assigned it to a variable. (i.e.)
@a = Select * from foo ---Obviously mine is much more robust
How do I execute @a to actually Select * from foo?
Everything about this query works except I'm trying to capture the @companyid (which is a variable) into a column in my table via my select statement.
My error is Invalid column name 'A113', etc. However it is the A113 I'm trying to insert into the first column of the table SAP_GLsummary
-- retrieves a list of gl balances from all companies
truncate table sap_glsummary
declare @companyID char(6)
declare c_company cursor for
select INTERID from dbo.GP_Interid
open c_company fetch next from c_company into @companyID
[Code] .....
In my program i have function that will get one value from Database.
Here i want to assign the output of the sql query to a local variable.
Its like select emp_id into Num from emp where emp_roll=222;
here NUM is local variable which was declared in my program.
Is it correct.?
can anyone please guide me..?
Is it possible to have an entire sql select statement as the input variable to a stored procedure? I want the stored procedure to execute the select statement.
ie.
exec sp_SomeFunc 'select * from table1 where id=1'
It may sound weird, but I have my reason for wanting to do it this way. Is this possible? if so, how do I implement this inside the stored procedure?
What I'm trying to do is this;
I have a table with Year , Account and Amount as fields. I want to
SELECT Year, Account, sum(Amount) AS Amt
FROM GLTable
WHERE Year <= varYear
varYear being a variable which is each year from a query
SELECT Distinct Year FROM GLTable
My thought was that I would need to pass a variable into a select statement which then would be used as the source in my Data Flow Task.
What I have done is to defined two variables as follows
Name: varYear (this will hold the year)
Scope: Package
Data type: String
Name:vSQL (This will hold a SQL statement using the varYear)
Scope: Package
Data type: String
Value: "SELECT Year, Account, sum(Amount) AS Amount FROM GLTable WHERE Year <=" + @[User::varYear]
I've created a SQL Task as follows
Result set: Full Result Set
Connection Type: OLE DB
SQL Statement: SELECT DISTINCT Year FROM GLTable
Result Name: 0
Variable Name: User::varYear
Next I created a For Each Loop container with the following parameters
Enumerator: Foreach ADO Enumerator
ADO Object source Variable: User::varYear
Enumeration Mode: Rows in First Table
I then created a Data Flow Task in the Foreach Loop Container and as the source used OLE DB Source as follows
Data Access Mode: SQL Command from Variable
Variable Name: User::varYear
However this returns a couple of errors "Statement(s) could not be prepared."
and "Incorrect syntax near '='.".
I'm not sure what is wrong or if this is the right way to accomplish what I am trying to do. I got this from another thread "Passing Variables" started 15 Nov 2005.
Any help would be most appreciated.
Regards,
Bill
I'm sure this is a very simple piece of code, but I'm having trouble understanding how to do this.
First I have a database with three columns
ContactID
Hi
I am ramesh here from go-events.com
I am using sql mail to send out emails to my mailing list
I have difficulty combining a select statement with a where clause stored in a variable inside a cursor
The users select the mail content and frequency of delivery and i deliver the mail
I use lots of queries and a stored procedure to retrieve thier preferences. In the end i use a cursor to send out mails to each of them.
Because my query is dynamic, the where clause of my select statement is stored in a variable. I have the following code
that does not work
For example
DECLARE overdue3 CURSOR
LOCAL FORWARD_ONLY
FOR SELECT DISTINCT Events.E_Name, Events.E_SDate, Events.E_City, Events.E_ID FROM Events, IndustryEvents + @sqlquery2
OPEN overdue3
I get an error message at the '+' sign
which says, cannot use empty object or column names, use a single
space if necessary
How do I combine the select statement with the where clause?
Help me...I need help urgently
I tend to learn from example and am used to powershell. If for instance in powershell I wanted to get-something and store it in a variable I could, then use it again in the same code. In this example of a table order items where there are order_num, quantity and item_prices how could I declare ordertotal as a variable then instead of repeating it again at "having sum", instead use the variable in its place?
Any example of such a use of a variable that still lets me select the order_num, ordertotal and group them etc? I hope to simply replace in the "having section" the agg function with "ordertotal" which bombs out.
select order_num, sum(quantity*item_price) as ordertotal
from orderitems
group by order_num
having sum(quantity*item_price) >=50
order by ordertotal;
Consider the below code: I am trying to find a way so that my select statement (which will actually be used to insert records) can randomly place values in the Source and Type columns that it selects from a list which in this case is records in a table variable. I dont really want to perform the insert inside a loop since the production version will work with millions of records. Anyone have any suggestions of how to change the subqueries that constitute these columns so that they are randomized?
SET NOCOUNT ON
Declare @RandomRecordCount as int, @Counter as int
Select @RandomRecordCount = 1000
Declare @Type table (Name nvarchar(200) NOT NULL)
Declare @Source table (Name nvarchar(200) NOT NULL)
Declare @Users table (Name nvarchar(200) NOT NULL)
Declare @NumericBase table (Number int not null)
Set @Counter = 0
while @Counter < @RandomRecordCount
begin
Insert into @NumericBase(Number)Values(@Counter)
set @Counter = @Counter + 1
end
Insert into @Type(Name)
Select 'Type: Buick' UNION ALL
Select 'Type: Cadillac' UNION ALL
Select 'Type: Chevrolet' UNION ALL
Select 'Type: GMC'
Insert into @Source(Name)
Select 'Source: Japan' UNION ALL
Select 'Source: China' UNION ALL
Select 'Source: Spain' UNION ALL
Select 'Source: India' UNION ALL
Select 'Source: USA'
Insert into @Users(Name)
Select 'keith' UNION ALL
Select 'kevin' UNION ALL
Select 'chris' UNION ALL
Select 'chad' UNION ALL
Select 'brian'
select
1 ProviderId, -- static value
'' Identifier,
'' ClassificationCode,
(select TOP 1 Name from @Source order by newid()) Source,
(select TOP 1 Name from @Type order by newid()) Type
from @NumericBase
SET NOCOUNT OFF
Hello... im having a problem with my query optimization....
I have a query that looks like this:
SELECT * FROM table1
WHERE location_id IN (SELECT location_id from location_table WHERE account_id = 998)
it produces my desired data but it takes 3 minutes to run the query... is there any way to make this faster?... thank you so much...
I am currently having this problem with gridview and detailview. When I drag either onto the page and set my select statement to pick from one table and then update that data through the gridview (lets say), the update works perfectly. My problem is that the table I am pulling data from is mainly foreign keys. So in order to hide the number values of the foreign keys, I select the string value columns from the tables that contain the primary keys. I then use INNER JOIN in my SELECT so that I only get the data that pertains to the user I am looking to list and edit. I run the "test query" and everything I need shows up as I want it. I then go back to the gridview and change the fields which are foreign keys to templates. When I edit the templates I bind the field that contains the string value of the given foreign key to the template. This works great, because now the user will see string representation instead of the ID numbers that coinside with the string value. So I run my webpage and everything show up as I want it to, all the data is correct and I get no errors. I then click edit (as I have checked the "enable editing" box) and the gridview changes to edit mode. I make my changes and then select "update." When the page refreshes, and the gridview returns, the data is not updated and the original data is shown. I am sorry for so much typing, but I want to be as clear as possible with what I am doing. The only thing I can see being the issue is that when I setup my SELECT and FROM to contain fields from multiple tables, the UPDATE then does not work. When I remove all of my JOIN's and go back to foreign keys and one table the update works again. Below is what I have for my SQL statements:------------------------------------------------------------------------------------------------------------------------------------- SELECT:SELECT People.FirstName, People.LastName, People.FullName, People.PropertyID, People.InviteTypeID, People.RSVP, People.Wheelchair, Property.[House/Day Hab], InviteType.InviteTypeName FROM (InviteType INNER JOIN (Property INNER JOIN People ON Property.PropertyID = People.PropertyID) ON InviteType.InviteTypeID = People.InviteTypeID) WHERE (People.PersonID = ?)UPDATE:UPDATE [People] SET [FirstName] = ?, [LastName] = ?, [FullName] = ?, [PropertyID] = ?, [InviteTypeID] = ?, [RSVP] = ?, [Wheelchair] = ? WHERE [PersonID] = ? ---------------------------------------------------------------------------------------------------------------------------------------The only fields I want to update are in [People]. My WHERE is based on a control that I use to select a person from a drop down list. If I run the test query for the update while setting up my data source the query will update the record in the database. It is when I try to make the update from the gridview that the data is not changed. If anything is not clear please let me know and I will clarify as much as I can. This is my first project using ASP and working with databases so I am completely learning as I go. I took some database courses in college but I have never interacted with them with a web based front end. Any help will be greatly appreciated.Thank you in advance for any time, help, and/or advice you can give.Brian
View 5 Replies View RelatedOk I have a query "SELECT ColumnNames FROM tbl1" let's say the values returned are "age,sex,race".
Now I want to be able to create an "update" statement like "UPATE tbl2 SET Col2 = age + sex + race" dynamically and execute this UPDATE statement. So, if the next select statement returns "age, sex, race, gender" then the script should create "UPDATE tbl2 SET Col2 = age + sex + race + gender" and execute it.
hiI need to write a stored procedure that takes input parameters,andaccording to these parameters the retrieved fields in a selectstatement are chosen.what i need to know is how to make the fields of the select statementconditional,taking in consideration that it is more than one fieldaddedfor exampleSQLStmt="select"if param1 thenSQLStmt=SQLStmt+ field1end ifif param2 thenSQLStmt=SQLStmt+ field2end if
View 2 Replies View RelatedHi guys,
I have the query below (running okay):
Code Block
SELECT DISTINCT Field01 AS 'Field01', Field02 AS 'Field02'
FROM myTables
WHERE Conditions are true
ORDER BY Field01
The results are just as I need:
Field01 Field02
------------- ----------------------
192473 8461760
192474 22810
Because other reasons. I need to modify that query to:
Code Block
SELECT DISTINCT Field01 AS 'Field01', Field02 AS 'Field02'
INTO AuxiliaryTable
FROM myTables
WHERE Conditions are true
ORDER BY Field01
SELECT DISTINCT [Field02] FROM AuxTable
The the results are:
Field02
----------------------
22810
8461760
And what I need is (without showing any other field):
Field02
----------------------
8461760
22810
Is there any good suggestion?
Thanks in advance for any help,
Aldo.
Hello friends,
I want to use select statement in a CASE inside procedure.
can I do it? of yes then how can i do it ?
following part of the procedure clears my requirement.
SELECT E.EmployeeID,
CASE E.EmployeeType
WHEN 1 THEN
select * from Tbl1
WHEN 2 THEN
select * from Tbl2
WHEN 3 THEN
select * from Tbl3
END
FROM EMPLOYEE E
can any one help me in this?
please give me a sample query.
Thanks and Regards,
Kiran Suthar
I am attempting to run update statements within a SELECT CASE statement.
Select case x.field
WHEN 'XXX' THEN
UPDATE TABLE1
SET TABLE1.FIELD2 = 1
ELSE
UPDATE TABLE2
SET TABLE2.FIELD1 = 2
END
FROM OuterTable x
I get incorrect syntax near the keyword 'update'.
In the below code i want to use select statement for getting customer
address1,customeraddress2,customerphone,customercity,customerstate,customercountry,customerfirstname,customerlastname
from customer table.Rest of the things will be as it is in the following code.How do i do this?
INSERT INTO EMImportListing ("
sql += " CustId,Title,Description,JobCity,JobState,JobPostalCode,JobCountry,URL,Requirements, "
sql += " IsDraft,IsFeatured,IsApproved,"
sql += " Email,OrgName,customerAddress1,customerAddress2,customerCity,customerState,customerPostalCode,
[code]....
I have 3 tables, with this relation:
tblChats.WebsiteID = tblWebsite.ID
tblWebsite.AccountID = tblAccount.ID
I need to delete rows within tblChats where tblChats.StartTime - GETDATE() < 180 and where they are apart of @AccountID. I have this select statement that works fine, but I am having trouble converting it to a delete statement:
SELECT * FROM tblChats c
LEFT JOIN tblWebsites sites ON sites.ID = c.WebsiteID
LEFT JOIN tblAccounts accounts on accounts.ID = sites.AccountID
WHERE accounts.ID = 16 AND GETDATE() - c.StartTime > 180
Hey guys i have a stock table and a stock type table and what i would like to do is say for every different piece of stock find out how many are available The two tables are like thisstockIDconsumableIDstockAvailableconsumableIDconsumableName So i want to,Select every consumableName in my table and then group all the stock by the consumable ID with some form of total where stockavailable = 1I should then end up with a table like thisEpson T001 - Available 6Epson T002 - Available 0Epson T003 - Available 4If anyone can help me i would be very appreciative. If you want excact table names etc then i can put that here but for now i thought i would ask how you would do it and then give it a go myself.ThanksMatt
View 2 Replies View RelatedGreetings everyone,
I am trying to use a c# string with an SQL statement in a data adapter (.NET 03)
The code works fine and I have a variable called : string test = ..... that takes the needed values. I just need to implement this string in the sql statement. I tried adding this to my query but I only got an empty row:
WHERE (login = '" & test & "')
WHERE (login = '" + test + "')
any ideas?
PS: If I change to something like WHERE (login = 'abcdef') I get a result meaning there's something wrong with the way I am putting the variable in the sql query.
Again, I am not putting the string in a normal query in my .cs code. this is happening by right clicking the data adapter and configuring the sql statement in the designer window
THANKS!