(Database Design) why in the database tables most of the times primery key name is: <tablename_id> a

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Published on 2010-05-27T17:49:11Z Indexed on 2010/05/27 18:01 UTC
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Hi, why in the database tables most of the times primery key name is: tablename_id and not id? example: user_id and not just id. Thanks

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