I don't believe that DDL Triggers exist, correct? Actually I am really curious about what options exist to automatically keep table definitions in sink (for two table) over time: for example a table and history table pair. I realise that History-Entity-Attribute-Value tables don't need this kind of maintenance, but I am depending on the ability to frequently query the history tables for the previous values of a particular record. I don't believe that History-EAV tables can do this. -- Regards, Richard Broersma Jr.