From: | "D'Arcy" "J(dot)M(dot)" Cain <darcy(at)druid(dot)net> |
---|---|
To: | pierre(at)desertmoon(dot)com |
Cc: | pgsql-sql(at)postgreSQL(dot)org |
Subject: | Re: [SQL] Quickie |
Date: | 1999-02-08 22:49:35 |
Message-ID: | m109zUm-0000bNC@druid.net |
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Thread: | |
Lists: | pgsql-sql |
Thus spake pierre(at)desertmoon(dot)com
> Given:
> User_Email|User_ID
> -------------------
> fubar | 1
> barfu | 2
> snafu | 3
> Fubar | 4
>
> What query could I use to return ONLY 'fubar' and 'Fubar'? Would I do a self
Well, the obvious is;
SELECT * FROM x WHERE User_Email = 'fubar' OR User_Email = 'Fubar';
But I assume you are looking for something more useful. Are you trying
to catch all entries not in all lower case? Try this:
SELECT * FROM x WHERE User_Email != lower(User_Email);
Or you can convert to lower with this:
UPDATE x SET User_Email = LOWER(User_Email);
If you have a unique index on User_Email then the ones that already
exist will fail and then you can use the first one to find the ones
that didn't get converted. Those will be the dups.
--
D'Arcy J.M. Cain <darcy(at){druid|vex}.net> | Democracy is three wolves
http://www.druid.net/darcy/ | and a sheep voting on
+1 416 424 2871 (DoD#0082) (eNTP) | what's for dinner.
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