Dann, > The primary key should be immutable, meaning that its value should not be > changed during the course of normal operations of the database.
Why? I don't find this statement to be self-evident. Why would we have ON UPDATE CASCADE if keys didn't change sometimes? > At any rate, the use of natural keys is a mistake made by people who have > never had to deal with very large database systems. Oh, I guess I'm dumb then. The biggest database system I ever had to deal with was merely 5 TB ... Anyway, my opinion on this, in detail, will be on the ITToolBox blog. You can argue with me there. -- Josh Berkus Aglio Database Solutions San Francisco ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
