DECLARE @i int
DECLARE @a table (i int)
SET @i = 0
WHILE @i < 100000
BEGIN
INSERT INTO @a values(@i)
SET @i = @i + 1
END

After which I have checked again the log file size and it was now 1536 kb.
So this shows us, that although table variables are not being rolled back, and although the log of tempdb is not used to redo anything anyway (since at startup tempdb is recreated), still any write to table variables is being logged to tempdb's log.
And this is something that deems to be unnecessary, especially due to the fact that SQL Server has to for writes to the log, and if SQL Server would not write table variables tot he log then there would probably be a performance gain.
As such I would say that for an OLAP server, I would rather have an extra spindle for the tempdb log rather then for the database log, since for reads the tempdb log perfomance is more of a concern.

My question is that – Is Table variable hits the performance? if yes then how and how we can manage it..

I want to create table permanent by the using procedure and pass it table name as variable as like below.

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO

CREATE PROCEDURE [dbo].[ProcInsTab]
@Emp_ID varchar(50),
@Password varchar(max),
@Emp_Name varchar(100),
@Address varchar(250),
@City varchar(50),
@Mobile_No varchar(10)
AS

CREATE TABLE @Emp_ID(
[Description] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[Catalog Version] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[Mailed] [float] NULL ,
[Sales] [money] NULL ,
[Production $] [int] NOT NULL ,
[Orders] [float] NULL ,
[Response] [float] NULL ,
[Response of Test Control] [int] NOT NULL ,
[Average Invoice] [float] NULL ,
[SMP] [float] NULL ,
[SMP of Test Control] [int] NOT NULL ,
[Catalog Title] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[Brand] [varchar] (1) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[Drop Date] [smalldatetime] NULL
) ON [PRIMARY];
INSERT INTO [Employee_Master]
([Emp_ID]
,[Password]
,[Emp_Name]
,[Address]
,[City]
,[Mobile_No])
VALUES
(@Emp_ID, @Password,@Emp_Name, @Address,@City, @Mobile_No);
Please help me how to solved this problem.

Everytime we execute a batch in EXEC function a new session is created and tem tables and table variables created in earlier session becomes unaccessible. If you create a single batch then you can get the desired result as below:

DECLARE @SqlString as varchar(max)
SET @SqlString = ‘DECLARE @TableVar TABLE(Col1 VARCHAR(100))’
SET @SqlString = @SqlString + ‘INSERT INTO @TableVar (Col1) VALUES(”Table Var – Outside Tran”)’
EXEC (@SqlString)
SET @SqlString = @SqlString + ‘SELECT Col1 AS TableVar_BeforeTransaction FROM @TableVar’
EXEC (@SqlString)

Regards,
Pinal Dave

I have modified the above query by adding one more variable to store the SQL Statement in SQLString,
When executed, I got the error in the @TableVar

– Start –

DECLARE @TableVar TABLE(Col1 VARCHAR(100))
DECLARE @SqlString as varchar(max)

SET @SqlString = ‘INSERT INTO @TableVar (Col1) VALUES(”Table Var – Outside Tran”)’

EXEC (@SqlString)

SET @SqlString = ‘SELECT Col1 AS TableVar_BeforeTransaction FROM @TableVar’

EXEC (@SqlString)

– End –

Msg 1087, Level 15, State 2, Line 1
Must declare the table variable “@TableVar”.
Msg 1087, Level 15, State 2, Line 1
Must declare the table variable “@TableVar”.

——————————————————–

Please help me how to solved this problem.

Prepare the CREATE TABLE statement dynamically to create global or permanent table because temporary or table variable would not be accessible outside of execution statement.

Regards,
Pinal Dave

I want to create table by the using procedure and pass it table name as variable as like below.

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO

CREATE PROCEDURE [dbo].[ProcInsTab]
@Emp_ID varchar(50),
@Password varchar(max),
@Emp_Name varchar(100),
@Address varchar(250),
@City varchar(50),
@Mobile_No varchar(10)
AS

CREATE TABLE @Emp_ID(
[Description] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[Catalog Version] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[Mailed] [float] NULL ,
[Sales] [money] NULL ,
[Production $] [int] NOT NULL ,
[Orders] [float] NULL ,
[Response] [float] NULL ,
[Response of Test Control] [int] NOT NULL ,
[Average Invoice] [float] NULL ,
[SMP] [float] NULL ,
[SMP of Test Control] [int] NOT NULL ,
[Catalog Title] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[Brand] [varchar] (1) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[Drop Date] [smalldatetime] NULL
) ON [PRIMARY];
INSERT INTO [Employee_Master]
([Emp_ID]
,[Password]
,[Emp_Name]
,[Address]
,[City]
,[Mobile_No])
VALUES
(@Emp_ID, @Password,@Emp_Name, @Address,@City, @Mobile_No);

Please help me how to solved this problem.

You need to make sure that you are executing all these queries at once.

This is table variable, so we need to declare at every execution time.

So here I think what did you do is:

First execute declare and insert statements and then you try to execute “select”. IN Table variable, you need to execute all statements at once then only you will get an actual result.

Scope of table variable is per execution.

Thanks,

Tejas

as like you said that i did below that but i got the error in the @TableVar

–Create Table Variable and insert single row

DECLARE @TableVar TABLE(Col1 VARCHAR(100))
INSERT INTO @TableVar (Col1)
VALUES(‘Table Var – Outside Tran’);

SELECT Col1 AS TableVar_BeforeTransaction
FROM @TableVar

THis is the error

Msg 1087, Level 15, State 2, Line 2
Must declare the table variable “@TableVar”.

can you explain that why error will come
Thanks & Regards,
D.Ponraj

create procedure foo
as
begin
declare @sql varchar(100)

set @sql=’CREATE TABLE #SalesTbl(file_no int,amount int,date datetime); ‘
set @sql+=’SELECT * FROM #SalesTbl’

exec(@sql)
end

exec dbo.foo
drop procedure foo

SELECT ‘day’ + CAST(DAY(Date) AS CHAR(2))

file_no
amount
date

is the above procedure possible

what i have to do is select the day part of the date(suppose 12/18/2009 i have to select 18) and put the value of amount into another tables column of that day (suppose day18)
is there any procedure to overcome this problem

Append all insert statment to variable @sql and then execute. As below

@sql = @sql + ‘INSERT INTO #SalesTbl VALUES(,,,) ‘
@sql = @sql + ‘INSERT INTO #SalesTbl VALUES(,,,) ‘
exec (@sql)

Regards,
Pinal Dave

is there any other alternative to my problem as i’m s/w developer and the global temporary table will be accessed by other user also.

i’m having definition in a variable like

DeclARE @sql varchar(100)
set @sql=‘CREATE TABLE #SalesTbl
(SalesID int, SalesName varchar(10)) ;)
exec(@sql)

now i want to insert records?
this temporary table is expired
if i will use global temporary then it will be shared by other users

so Please suggest me

You can create temp table using EXEC statement but that would be available only in EXEC statement. For example:

EXECUTE ( ‘CREATE TABLE #SalesTbl
(SalesID int, SalesName varchar(10)) ;
INSERT INTO #SalesTbl VALUES(1, ”ss”)
SELECT * FROM #SalesTbl’) — success

SELECT * FROM #SalesTbl — Error

Because EXEC starts a new session and temp table created inside that session is not accessible outside the EXEC () script. If you create a global table than that would be accessible as below:

EXECUTE ( ‘CREATE TABLE ##SalesTbl
(SalesID int, SalesName varchar(10)) ;
INSERT INTO ##SalesTbl VALUES(1, ”ss”)
SELECT * FROM ##SalesTbl’ ) — success
SELECT * FROM ##SalesTbl — success

Regards,
Pinal Dave

i do have a temporary table definition in a variable.

how can i created this table ?
can i use exec @var?(var contains definition of temp table )

I need to do so because no of columns depends on user input

Please suggest me

All declared variables in SQL server are local variables and are available only in current session. There is nothing to specify the scope of variable. Table vriable is a variable of data type “Table”. Here Table does not specify the scope of variable but specify the data type of variable.

Regards,
Pinal Dave