How Do I Make Select Query With Variable Table Name?

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SQL-Server-2008R2

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hello dears
Suppose that we have many tables, with name like "table1" and "table2" and "table3"
i want make query with varible name, so that i can make query on all tables

SQL

CREATE PROCEDURE selectWithVaribleTableName
@x int -- [any number between 1 and 1000]
as
declare @tablename nvarchar(256)
set @tablename ='table' + convert(nvarchar(100),@x)
select * from @tablename
go

but i get error.
please help me

Posted 25-May-15 21:49pm

ali64iust

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Mehdi Gholam · Answer 1 · 2015-05-25T22:06:00

Solution 1

In stored procedures all table names should be known at "compile time" meaning you can't use variable names.

If you need dynamic queries then you should use exec() : http://www.mssqltips.com/sqlservertip/1160/execute-dynamic-sql-commands-in-sql-server/[^]

However there are security issues associated with this and is discouraged.

Posted 25-May-15 22:06pm

Mehdi Gholam

Comments

Maciej Los 26-May-15 5:09am

5ed!

Mehdi Gholam 26-May-15 5:09am

Cheers Maciej!

[no name] 26-May-15 6:34am

super cheers...

willington.d · Answer 2 · 2015-05-25T23:01:00

Solution 2

SQL

CREATE PROCEDURE selectWithVaribleTableName(@TableName Varchar(50))
as
begin
DECLARE @Query as varchar(max)
SET @Query = 'Select * FROM ' + @TableName
EXEC (@Query)
end

Posted 25-May-15 23:01pm

willington.d

Comments

ali64iust 26-May-15 7:04am

thank you very much
it works