php - MySQL, JOIN over multiple tables & Not IN? -


in application (image voting) have several roles user, voter & admin.

the select user looks this:

select * wp_awa_upload, category, subcategory  wp_awa_upload.uid = '$_session[id]'  , wp_awa_upload.parent_cat = category.cat_id  , wp_awa_upload.sub_cat = subcategory.id

a user can see own images, voter should see images on had not voted. when voter voting, there new entry table "wp_awa_session" id of uploaded image , own id. select above has adopted "and session_id , uploaded id not in table wp_awa_session" condition.

how can achieve this?

this correct select :-)

select *   wp_awa_upload wau  join category c on ( wau.parent_cat = c.cat_id )   join subcategory s on s.id = wau.sub_cat  status =  '1'  , (  wau.id, wau.uid  ) not   in (    select upload_id, user_id  wp_awa_session  user_id =  '$_session[id]'  , upload_id = wau.id  )

thanks :-)


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