How to write update query to update two tables with SQL Data Source?

Question

Is it possible to update two tables using SQL Data Source and ASP.NET Grid View? I have the following SQL Query for the Select statement.

SELECT 
   tbl_user         


        

Answer 1

<asp:SqlDataSource runat="server":
    SelectCommand="SELECT ... "
    UpdateCommand="UPDATE a; UPDATE b;"
    DeleteCommand="DELETE FROM a; DELETE FROM b;" />

Doesn't it work?

Answer 2

CREATE PROC UpdateUser
(
    @ID int
    ,@Pass varchar(15)
    ,@Email varchar(75)
   ) AS
BEGIN

Update
   tbl_user_login
Set
   Pass = @Pass
Where
   ID = @ID

Update
  tbl_user_profile
Set
  Email1 = @Email
Where
  ID = @ID

END

You can write multiple sql commands into a single sproc as I have above. Expand updates as needed. Deletes work the same way...

Answer 3

Yes, it's possible. Here is how to do it in a safe way:

CREATE PROCEDURE UpdateUser (@ID int, @Pass varchar(15), @Email varchar(75)) AS

BEGIN TRANSACTION

    UPDATE tbl_user_login SET Pass = @Pass WHERE ID = @ID

    IF @@ERROR <> 0
    BEGIN
        ROLLBACK
        RETURN
    END

    UPDATE tbl_user_profile SET Email1 = @Email WHERE ID = @ID

    IF @@ERROR <> 0
    BEGIN
        ROLLBACK
        RETURN
    END

COMMIT

In this way you don't need to be worried in case there is some error raised by any of the updates. Which means: If any of them will fail, the whole operation will be canceled and you will not have inconsistent data in your DB.

More about the use of Transactions here: http://www.4guysfromrolla.com/webtech/080305-1.shtml

The basic DELETE statement is: DELETE FROM <tablename> WHERE <condition>