Select a table from database

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SQL-Server-2008R2

Hi,

I am showing list of available databases in front-end. I am passing database name to stored procedure.

My Sql Query for sp:

SQL

exec 'sample_db'

My SP:

SQL

alter procedure sp_sample_db
@db_name nvarchar(100)
AS
BEGIN
SET NOCOUNT ON;
if exists(select name from master.dbo.sysdatabases where name =@db_name)
   begin
      select * from @db_name.dbo.my_table
   end
else
   begin
      print 'db not exists'
   end
END
GO

I know it can be done by using

SQL

select * from  [sample_db].dbo.my_table

But I want to try this some other way. Please help.
Thanks in advance

Posted 26-Mar-14 21:39pm

srmohanr

Updated 7-Jul-15 1:22am

v4

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syed shanu 27-Mar-14 4:54am

Chk this :
Declare @db_name varchar(20)='testTB'

select name from master.dbo.sysdatabases where name=@db_name

declare @q varchar(1000)
set @q = 'SELECT * FROM ' + @db_name + '.dbo.my_table'

exec (@q)

Andrius Leonavicius 27-Mar-14 6:00am

Post it as solution. ;)

KumarSundeep 27-Mar-14 6:41am

I think that's the worked solution. Please paste your solution below in solution box.

srmohanr 27-Mar-14 5:01am

Thanks its working.

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syed shanu · Answer 1 · 2014-03-27T14:18:00

Solution 1

Chk this :

SQL

Declare @db_name varchar(20)='testTB' 
select name from master.dbo.sysdatabases where name=@db_name 
declare @q varchar(1000) 
set @q = 'SELECT * FROM ' + @db_name + '.dbo.my_table' 
exec (@q)

Posted 27-Mar-14 14:18pm

syed shanu