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Seifuddin, Lamar T.* (LSEIFUDD) wrote:
| Hello All,
|
| I am using mysql on Linux - RedHat 7.1.
| The basic stuff is simple, cool, too.
|
| I am a newbie, so forgive me if this is too simple a question.
|
| Is there a mechanism available somewhere in doing an "automated"
update of a
| field.
|
| example.
|
| team is a table.
|
| wins, losses, pct are fields of team table.
|
| I want to enter wins and/or losses and have pct be automatically updated.
|
| where pct is wins/(wins + losses)
|
| or do I have to write a script (not lazy, just wanted to know if something
| was available)
|
| I appreciate any advice or direction.
What you're talking about is a trigger. MySQL doesn't have them yet. In
general they're used inappropriately anyways. This example would be an
inappropriate use (in most cases). Simply compute the "pct" field when
you do your queries:
~ SELECT wins, losses, wins / (wins + losses) as pct FROM team
-Mark
- --
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~ __ ___ ___ ____ __
~ / |/ /_ __/ __/ __ \/ / Mark Matthews <[EMAIL PROTECTED]>
~ / /|_/ / // /\ \/ /_/ / /__ MySQL AB, Full-Time Developer - JDBC/Java
~ /_/ /_/\_, /___/\___\_\___/ Flossmoor (Chicago), IL USA
~ <___/ www.mysql.com
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