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From: Peter van Oosterom <Peter.van.Oosterom@fel.tno.nl>
Subject: counting combinations
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Date: Sat, 13 Mar 93 13:01:03 MET
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Dear Postgres-group,

I want to count combinations of attribute values.
For example in relation X:
   a     b
   3     6
   2     3
   3     8
I would like to obtain the following result Y:
   a     number_of_b
   3     2
   2     1
Is this possible in Postquel?

Kind regards, Peter van Oosterom.