On 08-Jul-01 Jonah Klimack wrote:

> 
> What I don't want, is the same category name and
> customerID twice, even if it does have an index column 
> that differentiates it from other rows.
> 

> 
> I've tried this:
> ID INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
> customerID INT UNSIGNED,
> categoryname VARCHAR(20) UNIQUE
> 
> but I get an error
> 
> Right now I'm trying to figure out what, and how
> to use an index for my situation, but I find the 
> mysql docs are badly organized and hard
> to read.  
> 

Get your duplicates out then:

ALTER TABLE da_table ADD UNIQUE KEY idx_catcus (categoryname,customerID);
 
Regards,
-- 
Don Read                                       [EMAIL PROTECTED]
-- It's always darkest before the dawn. So if you are going to 
   steal the neighbor's newspaper, that's the time to do it.

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