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Re: [SQL] Quickie

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: (view raw, whole thread or download thread mbox)
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                |  and a sheep voting on
+1 416 424 2871     (DoD#0082)    (eNTP)   |  what's for dinner.

In response to

  • Quickie at 1999-02-08 21:57:22 from pierre

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Next:From: Oliver ElphickDate: 1999-02-09 00:03:06
Subject: Re: [SQL] HAVING
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