I think you are missing som important info in your file: the type of the join.

Are they all inner equi-joins? Or are some them left or right joins?

It will make a hell of a difference as you could loose a lot of relevant records by assuming it are all inner equi-joins

Also as soon as left or right joins are involved the solution is not symmetrical anymore as operations with outer joins (left or right) are not commutative. I'm not sure if they are associative, but a combination of inner and outer joins is certainly not associative.

CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

In reply to Re: Advise on sql table mapping. by CountZero
in thread Advise on sql table mapping. by dbmathis

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