| From: | "Jules Alberts" <jules(dot)alberts(at)arbodienst-limburg(dot)nl> |
|---|---|
| To: | pgsql-sql(at)postgresql(dot)org |
| Subject: | filtering out doubles |
| Date: | 2003-03-12 10:03:35 |
| Message-ID: | 20030312100410.BBFD01CB1A5@koshin.dsl.systemec.nl |
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| Thread: | |
| Lists: | pgsql-sql |
Hello everyone,
I was wondering how to filter out double values (where "value" spans
two columns COL1 and COL2) with a SELECT statement. If I have this
table:
COL1 |COL2 |COL3
-----------------------------
a |b |some value
a |b |another value
a |c |yet another value
what would be the select statement to get this result:
COL1 |COL2 |COL3
-----------------------------
a |b |some value
a |c |yet another value
I was thinking that DISTINCT would do this, but I don't want to loose
COL3. TIA for any tips!
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