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two-column primary key (not the typical question) - Mailing list pgsql-general

From Chip Nowacek
Subject two-column primary key (not the typical question)
Date
Msg-id CAFsC43EeKenOGKNDoJqLMS4VZQnFTNEsnhYUySHyZODSmveVpQ@mail.gmail.com
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Responses Re: two-column primary key (not the typical question)  (Chris Travers <chris.travers@gmail.com>)
Re: two-column primary key (not the typical question)  (Gurjeet Singh <singh.gurjeet@gmail.com>)
List pgsql-general
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I need a suggestion. I need a two-column primary key that does not depend on the order of the entries. That is, for the purposes of the key:

PKColA     PKColB
foo            bar
bar            foo

is not valid.

Any help would be appreciated.

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