> 
> ps: I just think postresql could make this easyly. Don't you think ? Any
> function or anything else.

What's hard about the self-join?  That's how SQL works.

A

-- 
Andrew Sullivan  | [EMAIL PROTECTED]
When my information changes, I alter my conclusions.  What do you do sir?
                --attr. John Maynard Keynes

---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
       choose an index scan if your joining column's datatypes do not
       match

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