Using NULL in MySQL

Posted by JPro on Stack Overflow See other posts from Stack Overflow or by JPro
Published on 2010-03-01T11:35:11Z Indexed on 2010/05/28 6:51 UTC
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The data in my dabatase comes from an external source and where ever there is no data passed, I keep NULL in those places. Can anyone tell me if there are any implications in using NULL to represent empty value? Should I follow some other convention like 'data_not_available'? or something like that?

Can anyone suggest?

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