From: Bob Hutzel <tidal7@myrealbox.com>
To: pgsql-sql@postgresql.org
Subject: Cross joining table with itself
Date: Sun, 21 Sep 2003 14:38:23 GMT
Message-ID: <pan.2003.09.21.14.33.57.361582@myrealbox.com> (raw)
I've been stumped trying to solve this problem via SQL. I have a table ID,
member1, member2, member3. In any row, any member field may have a value
or be null. I want to tally up how many times each member appears in the
table as a whole. For example, if two entries were ('a', '', 'c') and
('b', 'c', ''), I'd like my final result to be:
a, 1
b, 1
c, 2
Is this feasible? Thank you for any help.
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To: pgsql-sql@postgresql.org
Cc: tidal7@myrealbox.com
Subject: Re: Cross joining table with itself
In-Reply-To: <pan.2003.09.21.14.33.57.361582@myrealbox.com>
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