How To Use A Table Variable
Nov 1, 2006
Hi all,
I have a table which holds a list of users names & the table assigned to each, e.g.
- John Smith - Table1
- bob Jones - Table2
etc
I have a store procedure which calls the information from the user's table based on the username. Something like this:
Select *
from @UserTable
So if user is John Smith then @UserTable = Table1.
Though the @ function does not work for referencing a table. Is there a workaround to this ?
Rgds & thanks.
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Nov 4, 2015
CREATE TABLE #T(branchnumber VARCHAR(4000))
insert into #t(branchnumber) values (005)
insert into #t(branchnumber) values (090)
insert into #t(branchnumber) values (115)
insert into #t(branchnumber) values (210)
insert into #t(branchnumber) values (216)
[code]....
I have a parameter which should take multiple values into it and pass that to the code that i use. For, this i created a parameter and temporarily for testing i am passing some values into it.Using a dynamic SQL i am converting multiple values into multiple records as rows into another variable (called @QUERY). My question is, how to insert the values from variable into a table (table variable or temp table or CTE).OR Is there any way to parse the multiple values into a table. like if we pass multiple values into a parameter. those should go into a table as rows.
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Aug 29, 2007
which is more efficient...which takes less memory...how is the memory allocation done for both the types.
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Jul 19, 2012
I don't know if it's a local issue but I can't use temp table or table variable in a PP query (so not in a stored procedure).
Environment: W7 enterprise desktop 32 + Office 2012 32 + PowerPivot 2012 32
Simple example:
declare @tTable(col1 int)
insert into @tTable(col1) values (1)
select * from @tTable
Works perfectly in SQL Server Management Studio and the database connection is OK to as I may generate PP table using complex (or simple) queries without difficulty.
But when trying to get this same result in a PP table I get an error, idem when replacing table variable by a temporary table.
Message: OLE DB or ODBC error. .... The current operation was cancelled because another operation the the transaction failed.
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Sep 17, 2007
In a table-valued UDF, does the UDF use a table variable or a temp table to form the resultset returned?
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Oct 6, 2014
I am trying to use a stored procedure to update a column in a sql table using the value from a variable table I getting errors because my syntax is not correct. I think table aliases are not allowed in UPDATE statements.
This is my statement:
UPDATE [dbo].[sessions_teams] stc
SET stc.[Talks] = fmt.found_talks_type
FROM @Find_Missing_Talks fmt
WHERE stc.sessionid IN (SELECT sessionid FROM @Find_Missing_Talks)
AND stc.coupleid IN (SELECT coupleid FROM @Find_Missing_Talks)
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Jan 6, 2004
Hi there,
Can someone tell me if it is possible to add an index to a Table variable that is declare as part of a table valued function ? I've tried the following but I can't get it to work.
ALTER FUNCTION dbo.fnSearch_GetJobsByOccurrence
(
@param1 int,
@param2 int
)
RETURNS @Result TABLE (resultcol1 int, resultcol2 int)
AS
BEGIN
CREATE INDEX resultcol2_ind ON @Result
-- do some other stuff
RETURN
END
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Feb 26, 2008
Hi all,
my stored procedure have one table variable (@t_Replenishment_Rpt).I want to create an Index on this table variable.please advise any of them in this loop...
below is my table variable and I need to create 3 indexes on this...
DECLARE @t_Replenishment_Rpt TABLE
(
Item_Nbr varchar(25) NULL,
Item_Desc varchar(255) NULL,
Trx_Date datetime NULL,
Balance int NULL,
Trx_Type char(10) NULL,
Issue_Type char(10) NULL,
Location char(25) NULL,
Min_Stock int NULL,
Order_Qty int NULL,
Unit char(10) NULL,
Issue_Qty int NULL,
Vendor varchar(10) NULL,
WO_Nbr varchar(10) NULL,
Lead_Time int NULL,
PO_Nbr char(10) NULL,
PO_Status char(10) NULL,
Currency char(10) NULL,
Last_Cost money NULL,
Dept_No varchar(20) NULL,
MSDSNbr varchar(10) NULL,
VendorName varchar(50) NULL,
Reviewed varchar(20) NULL
)
I tryed all below senarios...it is giving error...
--Indexing the @t_Replenishment_Rpt table on the column Names Item Number, Vender , Department Number
--EXEC sp_executesql(CREATE UNIQUE CLUSTERED INDEX Replenishment_index ON @t_Replenishment_Rpt (Item_Nbr))
--CREATE UNIQUE CLUSTERED INDEX Idx1 ON @t_Replenishment_Rpt.Item_Nbr
INDEX_COL ( '@t_Replenishment_Rpt' , ind_Replenishment_id , Item_Nbr )
--EXEC sp_executesql('SELECT INDEXPROPERTY('+ '@t_Replenishment_Rpt' + ', ' + 'Item_Nbr' + ',' + 'IsPadIndex' + ')')
--EXEC sp_executesql(SELECT INDEXPROPERTY('@t_Replenishment_Rpt', 'Vendor','IsPadIndex'))
--EXEC sp_executesql(SELECT INDEXPROPERTY('@t_Replenishment_Rpt', 'Dept_No','IsPadIndex'))
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Jan 26, 2007
Hi All,Hope someone can help me...Im trying to highlight the advantages of using table variables asapposed to temp tables within single scope.My manager seems to believe that table variables are not advantageousbecause they reside in memory.He also seems to believe that temp tables do not use memory...Does anyone know how SQL server could read data from a temp tablewithout passing the data contained therein through memory???Is this a valid advantage/disadvantage of table variables VS temptables?
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Jul 20, 2005
SQLLY challenged be gentle --Trying to create code that will drop a table using a variable as theTable Name.DECLARE @testname as char(50)SELECT @testname = 'CO_Line_of_Business_' +SUBSTRING(CAST(CD_LAST_EOM_DATEAS varchar), 5, 2) + '_' + LEFT(CAST(CD_LAST_EOM_DATE AS varchar),4)+ '_' + 'EOM'FROM TableNamePrint @testname = 'blah...blah...blah' (which is the actual tablename on the server)How can I use this variable (@testname) to drop the table? Undersevere time constraints so any help would be greatly appreciated.
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Jan 17, 2008
In a previous post "Could #TempTable within SP cause lock on tempdb?" http://forums.microsoft.com/msdn/showpost.aspx?postid=2691763&siteid=1
It was obvious that we have to limit the use of #Temp table to a minimum. Let assume that some of the temp tables are really difficult to replace and we have to live with them.
Would it be easier on tempdb if the #TempTable is replaced by a table variable? Or do they all end up in tempdb?
Thanks in advance for any help.
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Mar 19, 2008
I have a stored produre. Inside this stored procedure I have table variable with one column. Once the table variable is populated with rows, I would like to pass each value in the table, into a table-valued function. The table-valued function may return any number of rows. I would like all the rows the TVF returns to be returned from the stored procedure as a single result set. I would also like to do this without defining a table variable to hold the results of the table-value function.
Code Snippet
declare @IdTable table
(
EmployeeId nvarchar( 16 ) not null
)
insert into @IdTable
select EmployeeNumber from Employees
/*
I need to run this query for every EmployeeId value in @IdTable and return the results from the stored proc as a single result set.
*/
select * from fn_GetEmployeeById( EmployeeId )
Any help is very much appreciated.
Andrew
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Feb 22, 2008
In my stored procedure i have a multi-valued varchar(max) parameter and I wrote a table-valued function that takes the varchar(max) and return a table back to the stored procedure where i inserted into a @table. Just wondering is there a better and faster way of doing this?
ALTER PROCEDURE [dbo].[rpt]
(
@CourtIDs as nvarchar(MAX) -- @CourtIDs = '1231,3432,1234,3421'
)
AS
--split CourtIDs into a table
DECLARE @tbCourtIDs table(CourtID int NOT NULL PRIMARY KEY)
INSERT INTO @tbCourtIDs
select * from dbo.Split(@CourtIDs, ',')
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Apr 1, 2007
hi all, if i have a function which it returns a table and i need to work with the table retured many times in the stored procedure, then should i use a temporary table or a table variable to store the returned table ? or it's there a better way in doing that?
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Oct 15, 2004
I have read alot of articles saying that we should use Table variable for small volume of data, Temp table for large volume of table.
However, how to determine small and large??? Willing for your comment and answer..
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Nov 26, 2004
Hello, everyone:
I want to save some temporal data in the stored procedure. Comparing temporal table and table type variable, which one is better regarding to the performance?
Thanks
ZYT
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Sep 10, 2007
I need to update a table variable with a sum from another table. Something like this:
DECLARE @MyTableVariable Table
(
Location varchar(10),
ItemNumber Varchar(10)
Amount money,
Quantity int
)
UPDATE @MyTableVariable
SET Quantity =( SELECT SUM(Quantity)
FROM myTable
WHERE @MyTableVariable.[Location] = myTable.[Location]
and
@MyTableVariable.[ItemNumber] = myTable.[ItemNumber] )
The where clause does not work though. Is there a way to do this?
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Apr 14, 2008
what is the difference between Temporary table and Table variable ,need one example with both(#t,@t) to know the scope
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Sep 20, 2007
Hello,
Which is better? Using a table variable or a temporary table?
Mannu.
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Nov 17, 2015
in order to store huge data, should i use temp table or table variable(performance wise) and why?
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Oct 17, 2005
I'm a new member of forum,
I'm a Brazilian, and don't speak english very good...
But, i need help...
private void Page_Load(object sender, System.EventArgs e)
{
string ConnectionString = "server=Server;database=db;user
id=XXX;pwd=YYY";
string CommandText = "SELECT * FROM usuario";
SqlConnection myConnection = new SqlConnection(ConnectionString);
SqlCommand myCommand = new SqlCommand(CommandText, myConnection);
myConnection.Open();
dgrid.DataSource =
myCommand.ExecuteReader(CommandBehavior.CloseConnection);
dgrid.DataBind();
}
I'm want pass a value of database table to a variable, how to make it ?
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Jun 5, 2001
I cannot seem to pass a table name to an sp as a variable without having to construct the sql string first.
i.e i want to do this...
CREATE Procedure dbo.proc_sectranssummary
@tblname nvarchar (30)
AS
/************************************************** ******************/
CREATE TABLE @tblname (
Heading nvarchar (100),
Count_BatchID integer,
Sum_Units float,
Sum_AccruedIntDays integer
)
etc.
BUT it wont work and can only do it this way...
CREATE Procedure dbo.proc_sectranssummary
@tblname nvarchar (30)
AS
/************************************************** ********************/
DECLARE @sql nvarchar (2000)
SELECT @sql =
'CREATE TABLE ' + @tblname + '
(
Heading nvarchar (100),
Count_BatchID integer,
Sum_Units float,
Sum_AccruedIntDays integer
)'
EXEC(@sql)
etc.
but this makes it difficult when going on to use the table later on in INSERTS etc in the same sp.
pls Help!!
Palmy
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Jan 2, 2003
Help!
I am writing a cursor that goes out and retrieves all the tables that contain a certain column name and then inserts specific data from those tables into a new table. The problem i'm having is even though I can load the table names into a variable I can't use that variable as a table name to do the insert. It gives me an error that the variable hasn't been declared even though it has. Is there any tricks I can do to make SQL treat the variable as a table name so I can run the Insert from these table names?
Dave
Here is the what I've got so far:
Declare @table_name varchar
Declare table_name_cursor CURSOR FOR
SELECT TABLE_NAME
FROM INFORMATION_SCHEMA.TABLES as t, syscolumns as s
WHERE t.TABLE_NAME = OBJECT_NAME((s.ID)) and s.Name='ModBy'and t.Table_Type = 'Base Table'
CREATE TABLE
##oldusers
(
NameIDint,
OldestDt Datetime
)
;
Open table_name_cursor
Fetch Next From table_name_cursor
Into @table_name
WHILE @@FETCH_STATUS = 0
Begin
Insert into ##oldusers(NameID,OldestDt)
Select Addby, Max(AddDt)
FROM @table_name<---This is the problem.
group by Addby
Fetch Next From table_name_cursor
Into @table_name
End
Close table_name_cursor
Deallocate table_name_cursor
GO
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Jun 10, 2002
HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!
I have a UDF that will return a fully qualified table name given a few parameters. What I would like to do is call my UDF in a SQL statement and NOT have to use the sp_executesql and pass my query in as a string.
The reason for this is I have no promises from my client of the server and database name for the tables that I am going to use so I would like to build a UDF that I could change the server name and database name in ONE place and have all my queries using the right database. I basically have 3 "applications' that I need to do business with. For simplicity sake we'll just call them 'APP1','APP2','APP3'.
Example:
If my table is called 'TABLEA' and it's a table for 'APP1', what I have is UDF where you pass in the application and table and it returns the fully qualified path to the table. For example:
Select @TheTableName = dbo.MYUDF('app1','tablea')
Result is @TheTableName would be 'SERVER_FOR_APP1.DBO.TABLEA'
What I have found that I had to do is build a nvarchar(????) string of my query and then call sp_executesql and pass it the query via the nvarchar string. There are cases where this will not work - For example:
Select @somevalue = sometable.field from server_for_app1.dbo.sometable where someprimarykey = 123
Ideally I could code this as:
Select @somevalue = sometable.field from MyUDF('APP1','SOMETABLE') where someprimarykey = 123
Again, "MyUDF" returns a varchar() of the fully qualified table name including server and database name.
Does anyone know how I can make this work?
Thanks for any help you can provide and apologies for any cross posting!
Sincerely,
Dave Dulong
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Jun 8, 2004
May I have an idea about table variable?I want to know the scope and capacity of a table variable?How much data can it hold maximum?
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Nov 23, 2004
How can i make a table name using a variable?
ALTER PROCEDURE [P_Batch_Temp_Table] @User nvarchar(100), @Prog nvarchar(2), @Type nvarchar(4) as
DECLARE @UserN nvarchar(100)
SET @UserN = @User
select * into ##Temp_Batch_ + @UserN
from tbl_batch WHERE PROD = @progN and TYPE = @TypeN and [User] = @UserN
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Nov 18, 2013
is it possible to create a temp table and iterate through each database in the temp table? Something like and this would iterate both tables in the databse and display the results. (Of course I would actually be doing this on a much larger scale and not just selecting *
Code:
Declare @CountCheck int
Create table #databse
[code]...
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May 7, 2008
I work in a Decision Support role and we are moving from Access to SQL Server 2005.
One process we often do in Access is create unique tables for individuals and then export them out as Excel files. We read the person's name from a file and use that variable as the file name.
But I can't find a way to do that in SQL.
I want to do a select into and use the variable as the name but it doesn't work.
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Mar 17, 2006
Is this possible ?
DECLARE @item nvarchar(50)
DECLARE @tabel varchar (50)
SET @item = 'ZVIN'
SET @tabel = 'u_tbl_inhuizen_openstaand_nw_deze_week'
select * from @tabel as tt where itemtype = @item
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Jun 18, 2006
Hi,
INSERT INTO [Raw].dbo.[@year]...
How to use a variable in such a statement above? i need to use variable as a table name, please help me.
thanks
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Jan 15, 2008
I ran into this while testing some stuff and was wonding if it is some known behavior or not?
All that I'm doing is create a table variable, loading it with some data and then updating a random number of rows to a value. In this example I'm trying to update 3 rows and setting the Code columm to 'A'.
You will notice that there are 3 declarations of the table variable at the top of the script. I get why the first one may not work, but I would expect the second one to wokr correctly, but only the thirsd one works correctly. By "correctly" I mean updates 3 and only 3 rows.
(EDIT: I should probably note that I just hit "refresh" a bunch of times to notice that the first 2 table declarations updated a variable number of rows, for waht it's worth).
Maybe I can;t see the forest for the tree or somethig, but here is the script:DECLARE @Foo TABLE (ID INT IDENTITY, Bar INT, Code CHAR(1))
--DECLARE @Foo TABLE (ID INT IDENTITY(1, 1), Bar INT, Code CHAR(1))
--DECLARE @Foo TABLE (ID INT IDENTITY(1, 1) PRIMARY KEY, Bar INT, Code CHAR(1))
DECLARE @Count INT
INSERT @Foo
SELECT 1, NULL
UNION ALL SELECT 2, NULL
UNION ALL SELECT 3, NULL
UNION ALL SELECT 4, NULL
UNION ALL SELECT 5, NULL
UNION ALL SELECT 6, NULL
UNION ALL SELECT 7, NULL
SET @Count = 3
SELECT *
FROM @Foo
UPDATE Foo
SET Code = 'A'
FROM @Foo AS Foo
INNER JOIN
(
SELECT
ID,
ROW_NUMBER() OVER(ORDER BY NEWID()) AS RowNum
FROM
@Foo
) AS Temp
ON Foo.ID = Temp.ID
WHERE
Temp.RowNum <= @Count
SELECT *
FROM @Foo
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Sep 28, 2007
In SQL Server 2000, I'm trying to create a procedure that backsup a table based on variable name and then deletes the old table which will be recreate later. But get this error "Line 13: Incorrect syntax near '@new_Table'. "
Any suggestions? Just @new_Table but that doesn't work either.
Thanks!
USE db_name;
CREATE PROCEDURE BackUp_Tables
@tableName AS VARCHAR(50)
AS
DECLARE @new_Table NVARCHAR(50)
SET @new_Table = 'AD_' + @tableName
--IF EXISTS(SELECT name FROM sysobjects WHERE name = N'@new_Table AND xtype='U'')
IF OBJECT_ID(N'@new_Table', N'U') IS NOT NULL
DROP TABLE TableName
SELECT * INTO @new_Table FROM @tableName
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Feb 23, 2008
I'm using a script to enrich a package variable to the desired endstate.
Next thing I would like to do is to log the variable value into a table.
What strategy do you use to read a variable and log it into a table? I didn't get it working to get the variable in the flow as an input column from within the script task
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