This doesn't fit everywhere, but... 1) Never modify existing tables (okay, almost never). 2) Add new tables at will. 3) Pay a consultant to write PL/SQL that gl

This doesn't fit everywhere, but... 1) Never modify existing tables (okay, almost never). 2) Add new tables at will. 3) Pay a consultant to write PL/SQL that glues it all together and blame them for any and all issues.