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Duplicate information in parent and child tables - Mailing list pgsql-sql

From JORGE MALDONADO
Subject Duplicate information in parent and child tables
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Msg-id CAAY=A78k-evpWv5jC2TBst-ncN3tVXfK3POPdO3zr5ccOVKrtg@mail.gmail.com
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Responses Re: Duplicate information in parent and child tables  (msi77 <msi77@yandex.ru>)
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I have a parent table and a child table. In order to detect duplicate information I need to consider both tables. This means that a "duplicate record" consists of one parent record and one or more child records. 
Is there any standard approach to solve this issue?

Respectfully,
Jorge Maldonado

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