Effective strategy for leaving an audit trail/change history for DB applications?

Question

What are some strategies that people have had success with for maintaining a change history for data in a fairly complex database. One of the applications that I frequently

Answer 1

I use SQL Server, not PostgreSQL, so I'm not sure if this will work for you or not, but Pop Rivett had a great article on creating an audit trail here: Pop rivett's SQL Server FAQ No.5: Pop on the Audit Trail

Build an audit table, then create a trigger for each table you want to audit.

Hint: use Codesmith to build your triggers.