Comments on: SQL SERVER – DECLARE Multiple Variables in One Statement

By: Arjun Sah

Arjun Sah — Fri, 16 Dec 2011 02:44:23 +0000

variable_name datatype [NOT NULL := value ];

By: madhivanan

madhivanan — Wed, 19 Oct 2011 09:44:29 +0000

You cannot assign value to variables in where condition. You can only use it for comparison in the where clause

By: ravi

ravi — Tue, 18 Oct 2011 18:50:18 +0000

how to assign variable in where condition

By: madhivanan

madhivanan — Thu, 22 Sep 2011 08:34:44 +0000

DECLARE @Var1 INT, @Var2 INT
SET @Var1 = 1
SET @Var2 = 2
if @Var1=@Var2
print ‘these are equal’
else
print ‘these are not equal’

By: Dhaval

Dhaval — Thu, 22 Sep 2011 01:26:55 +0000

is there any way to compare these variable,

DECLARE @Var1 INT, @Var2 INT
SET @Var1 = 1
SET @Var2 = 2
SELECT @Var1 ‘Var1′, @Var2 ‘Var2′, @Var1 = @Var2 ‘Compare’

By: mehmet

mehmet — Thu, 15 Sep 2011 19:17:30 +0000

HOW TO USE LOCAL VARIABLE INSTEAD OF SELECT STATEMENT IN CURSOR ?

I CAN USE IT IN ORACLE.

LIKE THIS;

SET @STRSQL= ‘SELECT A FROM TABLE’

OPEN cur FOR @STRSQL

By: rama chandra sahu

rama chandra sahu — Mon, 12 Sep 2011 10:15:09 +0000

Is there any performance increase by using single declaration for multiple variables !

By: Tarun Dalwani

Tarun Dalwani — Wed, 31 Aug 2011 12:50:14 +0000

Hi to all,
I wanted to ask, whether there is any difference between declaring multiple variables in 1 statment and declaring multiple variables in multiple statments (1 in each statement).

I mean, is there any noteworthy difference from the point of view of performance, etc. Is any one better than the other for any reason?

By: Carl Hager

Carl Hager — Wed, 29 Jun 2011 19:56:57 +0000

Greeting Dave and All.

Although an older post, this and many other posts still referenced frequently, so I wanted to add the following exception to the above.

From BOL, when declaring *table variables* specifically, those must be the only variable declared. A trivial limitation imho, but one to be aware of.

http://msdn.microsoft.com/en-us/library/ms188927.aspx

Carl Hager

By: madhivanan

madhivanan — Fri, 04 Feb 2011 11:25:45 +0000

What do you want to do with a cursor?

By: hemant

hemant — Wed, 02 Feb 2011 12:30:35 +0000

Hi
i want to use cursor but in sql server 2005 there is no %table-type%,we have to create individual field and set into
fetch statement and even we can not get field like cursorName.FieldName in sql server like orale.

Send Me Reply if you have any alternate to cursor.

Thanking You

Hemant Patel

By: desigan

desigan — Fri, 03 Dec 2010 10:53:56 +0000

Hi all,
Im using cursor in my procedure,Im getting the value from 1 table,that value is stored in local variable @var,that value is the column name of another table.I want to pass the @var in Cursor Select Statement.How i do that..the Below statements im using…

Set @var=(select field from table1)

Declare cursorname cursor for
Select @var from table2 where No=2 —>Getting Error
open cursorname

By: Binay TIwari

Binay TIwari — Fri, 10 Sep 2010 05:28:43 +0000

Can we declare and initialize variables in one line

By: Binay TIwari

Binay TIwari — Tue, 27 Jul 2010 12:21:29 +0000

Thanks for the tutorial.Is it possible to deallocate local variable?

By: Himadri

Himadri — Mon, 15 Mar 2010 05:32:52 +0000

Thanks for providing such useful information.

Himadri

By: Madhivanan

Madhivanan — Mon, 01 Mar 2010 08:28:11 +0000

Probably you may need

select Name=lastname firstname from emp
UNION ALL
SELECT firstname from emp

By: Madhivanan

Madhivanan — Mon, 01 Mar 2010 08:27:09 +0000

There is no need and no way to do it

Use GO as a batch seperator so that variables would lose the scope

By: Rajesh

Rajesh — Mon, 26 Oct 2009 19:53:51 +0000

I want display like under from

select Name=lastname+’ ‘+firstname from emp

but all firstname should be left align like under one column.

Thanks
Rajesh

By: J

Thu, 16 Apr 2009 18:59:27 +0000

Can we undeclare variables? We can deallocate CURSOR varilable, how can we deallocate or undeclare local variable?

Thanks
J

By: R.Alamsha

R.Alamsha — Mon, 19 Jan 2009 10:39:33 +0000

Thanks for the tutorial.

I have a table like this:

TagKey TagID TagvALUE TagTimeStamp

I want to create this constraint:

“If the previous TagValue = current TagValue then do not update”.

Can you help me, please?. Thanks.

By: John

John — Sun, 02 Nov 2008 19:35:33 +0000

Same goes for assigning variables from a query

Select @Var1 = Col1, @Var2 = Col2 From Table …

By: Eric

Eric — Sun, 02 Nov 2008 14:52:30 +0000

Method 3: Single statements for declaring and defining multiple variables:

DECLARE @Var1 INT, @Var2 INT
SELECT @Var1 = 1, @Var2 = 2
SELECT @Var1 ‘Var1′, @Var2 ‘Var2′
GO