Can foreign keyed field allow nulls?

From: lbottorff(at)harveycounty(dot)com
To: pgsql-admin(at)postgresql(dot)org
Subject: Can foreign keyed field allow nulls?
Date: 2001-03-05 19:29:58
Message-ID: 86256A06.006B1D62.00@mail.harveycounty.com
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I have a table with a field I'd like to do a REFERENCES to a lookup table on;
however, this field is not manditory, i.e., can be NULL. Is it possible to do
such a thing?

LB

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