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---= sql String =---

 
du sixiang
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why the sql String "select u.user_name,u.user_id from db_users u ,db_orders o where
u.user_id=o.ore" can search what i want,but the
String "select u.user_name,u.user_id from db_users u ,db_orders o,db_vip_users v where
u.user_id=o.ore" show me "no rows"?
 
Ren Bia
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Because your select result part of your sql contains no columns of the table v and your where part of the sql also have no connect string of the table v and u/o!
 
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