Use database inside a stored procedure

Question

I need to make a stored procedure which creates a user in more than one database. Something like this:

USE [database1]

CREATE USER [userLogin] FOR LOGIN [us         


        

Answer 1

It should be noted that if you want to use single quotes within a EXEC command, you will need to double the amount of single quotes

e.g.

EXEC ('USE [database1]; select * from Authors where name = ''John'' ')

In this example, John has 2 single quotes before and after it. You cannot use double quotes for this type of query.

Answer 2

Dynamic SQL

CREATE PROCEDURE spTestProc
AS

EXEC ('USE [database1]; CREATE USER [userLogin] FOR LOGIN [userLogin]')

EXEC ('USE [database2]; CREATE USER [userLogin] FOR LOGIN [userLogin]')
GO

Answer 3

If you're writing dynamic SQL with EXEC sp_executesql ('query1') or EXEC ('query2') this will return correct db which you want. If you're writing static SQL or your query outside of dynamic SQL quotes or parantheses it will work on master (where you create stored procedure(default is master)).

CREATE PROCEDURE master.dbo.mysp1
AS

    EXEC ('USE model; SELECT DB_NAME()') -- or sp_executesql N'USE model; SELECT DB_NAME()' 
    --this returns 'model'

GO


CREATE PROCEDURE master.dbo.mysp2
AS

    EXEC ('USE model;') -- or sp_executesql N'USE model;'
    SELECT DB_NAME() 
    -- this returns 'master'

GO

Answer 4

CREATE PROCEDURE spTestProc
AS
BEGIN

EXECUTE sp_executesql N'USE DB1 SELECT * FROM TABLE1'


EXECUTE sp_executesql N'USE DB2 SELECT * FROM Table2'


END

exec spTestProc

now it is worked.

Answer 5

Using sp_executesql seems to work, for more info see http://msdn.microsoft.com/en-us/library/ms175170.aspx

I tested it using this and it worked fine:

CREATE PROCEDURE spTestProc
AS
BEGIN

EXECUTE sp_executesql N'USE DB1;'

SELECT * FROM TABLE1
EXECUTE sp_executesql N'USE DB2;'

SELECT * FROM Table2

END

exec spTestProc

Answer 6

I did it like below:

Alter Procedure testProc
@dbName varchar(50)
As
declare @var varchar(100)
set @var = 'Exec(''create table tableName(name varchar(50))'')'    
Exec('Use '+ @dbName + ';' + @var)
Exec testProc 'test_db'