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Asked: 2026-05-11T15:48:11+00:00

What I am trying to do is find out which fields were updated and

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What I am trying to do is find out which fields were updated and record the change to a different table.

DECLARE      @BillNo int,     @column_name varchar(500)    SELECT @BillNo = BillNo FROM INSERTED DECLARE HistoryMonitorLoop CURSOR FOR     SELECT             column_name      FROM          information_schema.columns     WHERE          table_name = 'Shipment'; OPEN HistoryMonitorLoop FETCH next FROM HistoryMonitorLoop INTO @column_name WHILE @@Fetch_status = 0 BEGIN     DECLARE         @OldValue varchar(500),         @NewValue varchar(500)     SET @OldValue = (SELECT @column_name FROM Deleted);     SET @NewValue = (SELECT @column_name FROM Inserted);     IF(@OldValue != @NewValue)     BEGIN         DECLARE @Comment varchar(5000)         SELECT @Comment = @column_name + ' Changed from ' + @OldValue + ' to ' + @NewValue         EXEC ShipmentNote_Insert @BillNo=@BillNo,@CoordinatorID=1,@Comment=@Comment     END     FETCH next FROM HistoryMonitorLoop INTO @column_name END CLOSE HistoryMonitorLoop DEALLOCATE HistoryMonitorLoop

what is happening is the 

SET @OldValue = (SELECT @column_name FROM Deleted);    SET @NewValue = (SELECT @column_name FROM Inserted);

are setting the @OldValue and @NewValue = to the columnname instead of the value of the column – sql is processing it as SET @OldValue = (SELECT 'column_name' FROM Deleted);

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1 Answer

  1. See this Pop on the Audit Trail It uses a query in a loop as opposed to a cursor, to do just what you’re wanting to do.

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