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    Contributing User
    Devshed Newbie (0 - 499 posts)

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    Aug 2000
    Quispamsis, NB, Canada
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    I have a script that adds fields to a database, but if a URL is added twice i would like it to tell them it is already there. I was thinking of doing a:
    SELECT * FROM table WHERE url = '$url'
    and if it cant find it then it adds it and if it can find it it informs the person....but i cant quite get it right. Can someone help? I use php (just so you know)

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    Contributing User
    Devshed Newbie (0 - 499 posts)

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    Oct 1999
    Annapolis, Maryland US
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    Consider making the URL field a primary key in the table so duplicates may not be added. If it cannot be made the primary key, then make it a unique key and include the appropriate error checks/error messages in your PHP script when inserting new data in the DB table.

    > alter table table_name add UNIQUE url_ind (URL);

    $query="insert into table_name values('$a', '$b', '$c', '$URL'...etc.";

    $result=mysql_query($query, $mysql_link);

    if($result){ print"Info added.";}

    print"ERROR: $errno - $error";

    Something like that...

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