When I am working with an Oracle database, I still find myself using SQL*Plus for many quick and dirty database queries. In particular, I often look up constraints in SQL*Plus. In this post, I look at ...

If you use Oracle in your business, you've probably come across triggers. These are sections of code that run in response to a particular event. For example, if you use Oracle to keep a database of ...

I think the logic is too complicated for a CHECK constraint, and I haven't managed to get a user-defined function to work it that context so it may not be possible that way.