Database design for database-agnostic applications

Question

What do I have to consider in database design for a new application which should be able to support the most common relational database systems (SQL Server, MyS

Answer 1

In complement to this answer, and as a general rule, do not let the server generate or calculate data. Always send straight SQL instructions, excluding formulas. Do not use default value properties (or make them basic, not formulas). Do not use validation rules Both default values and validation rules should be implemented on the client side.