default value based on select - Mailing list pgsql-general

Hi,

Is it possible to have a table's column default value set to some form of
select?

e.g. picking another table's value for a given SELECT ... WHERE ...

Already thankful for any insight,
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Pedro Doria Meunier
Ips. da Olaria, Edf. Jardins do Garajau, 4, r/c Y
9125-162 Caniço
Madeira - Portugal
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Skype : pdoriam
Mobile: +351961720188