Hello,

This is a very good article. One has to read it once in a while. I am well familiar with the concept and these 4 rules. But  every now and then, especially in the ad hoc outer join queries worked on with a non-SQL speaking visitor I start automatically typing translating from his English to SQL "...where my column = NULL... oops...IS NULL"

As for the stored code, it definitely should be as much language-independent as possibe. Listen to Miichael, use ANSI syntax.

Yelena