Hasnul Fadhly bin Hasan <hasnulfadhly.h@mimos.my> writes:
> I'm just wondering, what real benefit does inheritance have? When i
> create two tables, one inherited from the other,
> does that mean i have two tables with same duplicate data or actually
> they are joined in the back end?

It's more like an implicit UNION ALL. There's no duplication, but when
you specify a SELECT/UPDATE/DELETE over the parent table, the child
table is implicitly processed as well.

regards, tom lane

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