TSQL: UPDATE with INSERT INTO SELECT FROM

Question

so I have an old database that I\'m migrating to a new one. The new one has a slightly different but mostly-compatible schema. Additionally, I want to renumber all tables from

Answer 1

The best you can do that I know is with the output clause. Assuming you have SQL 2005 or 2008.

USE AdventureWorks;
GO
DECLARE @MyTableVar table( ScrapReasonID smallint,
                           Name varchar(50),
                           ModifiedDate datetime);
INSERT Production.ScrapReason
    OUTPUT INSERTED.ScrapReasonID, INSERTED.Name, INSERTED.ModifiedDate
        INTO @MyTableVar
VALUES (N'Operator error', GETDATE());

It still would require a second pass to update the original table; however, it might help make your logic simpler. Do you need to update the source table? You could just store the new id's in a third cross reference table.