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Posted by Kenneth Downs on 06/14/05 14:47
Domestos wrote:
> Hi all,
>
> How do I check in a mySQL table called 'Users' on column user_name when
> registering a new user_name to make sure the new 'user_name' does not
> already exist in that column?
>
> TIA
The database can do this by implementing a unique constraint on the column
user_name. After issuing the INSERT, (or any SQL command), check for an
error, and report it. This then solves your general problem of enforcing
data integrity and reporting errors.
--
Kenneth Downs
Secure Data Software, Inc.
(Ken)nneth@(Sec)ure(Dat)a(.com)
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