Question

I’m having a problem with a database, where it seems a column is updated with a wrong value. At the moment, I have no idea which program is doing this. What would be the best way to find this out? Things that could really help me are, in order of helpfulness:

• The application name
• the host executing the application
• the exact SQL statement.

Could the transaction log help me here? Can I write a logging trigger somehow?

Help would be appreciated.

Answer 1

You could create a trigger and a table, along the lines of

CREATE TRIGGER TRG_foo_U On foo FOR UPDATE
AS
SET NOCOUNT ON

IF UPDATE(bar)
   INSERT logtable
   SELECT APP_NAME(), HOST_NAME(), SUSER_SNAME(), GETDATE(), * FROM INSERTED
GO