Sql query to insert unique url in sql server 2000 database.

Hi,

I have sql insert query that is used to add url in th database. Suppose
urltitle="google"" and url="http://www.google.com" is present in the database.
I dont want same url url="http://www.google.com" will insert again.

here is my insert query
INSERT INTO linkstable (UrlTitle, Url, UserID,DateTimeStamp)
VALUES ('google','http://www.google.com','sam',GETDATE())

UrlID is the  primary key. I dont want that user can add same url again in the database if its present

thanks
Saroj13Asked:
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Aneesh RetnakaranDatabase AdministratorCommented:

either you can create a unique key on the url column or u can modify the query like this
INSERT INTO linkstable (UrlTitle, Url, UserID,DateTimeStamp)
SELECT  'google','http://www.google.com','sam',GETDATE()
Where not exists (SELECT 1 from linkstable WHERE url = 'http://www.google.com' )
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Saroj13Author Commented:
I cant set unique key to url column as my primary key is urlid.

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kbacCommented:
Yes you can

Open designer, right click on any column, select indexes, say add, and after selecting the new index, change the column to url column and say yes to unique parameter.
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