Re: Simple db table design question
From: --CELKO-- <71062.1056_at_compuserve.com>
Date: 19 Mar 2003 11:25:19 -0800
Message-ID: <c0d87ec0.0303191125.7898d7fb_at_posting.google.com>
FROM Foobar
WHERE ...; Received on Wed Mar 19 2003 - 20:25:19 CET
Date: 19 Mar 2003 11:25:19 -0800
Message-ID: <c0d87ec0.0303191125.7898d7fb_at_posting.google.com>
>> Actually in this case I can't guarantee that both home and work
emails are NOT NULL, ... <<
CREATE TABLE Foobar
(name ....
home_email VARCHAR(64),
work_email VARCHAR(64),
best_email CHAR(1) DEFAULT 'h' NOT NULL
CHECK (best_email IN ('h', 'w', 'n')),
...);
SELECT ...,
CASE WHEN best_email = 'h'
THEN home_email
WHEN best_email = 'w
ELSE '{{NONE}}' END AS email,
FROM Foobar
WHERE ...; Received on Wed Mar 19 2003 - 20:25:19 CET