wordpress - Options for including and excluding conditions in MySQL -


i working in wordpress , trying build query need include , exclude conditions. not excluding delete condition correctly (see results , expected results). want exclude query records '_fep_delete_by_1' exists. looking other options excluding records '_fep_delete_by_1' exists.

my tables

wp_posts  id | post_author | post_parent | post_type    | post_title | post_date 2258  163           0             fep_message    2262  1             2258          fep_message    re:a 2264  163           2258          fep_message    re:a 1698  1             0             fep_message    b 1692  1             0             fep_message    c  wp_postmeta meta_id | post_id | meta_key          | meta_value 14696     2258      _fep_participants   1 14697     2258      _fep_participants   163 9819      1698      _fep_participants   163 9820      1698      _fep_participants   1 9759      1692      _fep_participants   163 9760      1692      _fep_participants   1 9815      1692      _fep_delete_by_1    1499496054 13751     1698      _fep_delete_by_163  1501044119  wp_user id   | user_login  1      myname 163    theirname

my query

select distinct p.id, p.post_date, p.post_title, uf.user_login from_login, ut.user_login to_login  wp_posts p     join wp_postmeta pm_to     on          ((p.post_parent = pm_to.post_id          , p.post_parent <> 0)          or         (p.id = pm_to.post_id         , p.post_parent = 0))      , pm_to.meta_key = '_fep_participants'      , pm_to.meta_value <> p.post_author      left join wp_postmeta pm_delete     on          ((pm_delete.post_id = p.post_parent , pm_delete.meta_value = '_fep_delete_by_1')         or         (pm_delete.post_id = p.id , pm_delete.meta_value = '_fep_delete_by_1')) left join wp_users uf on uf.id = p.post_author  left join wp_users ut on ut.id = pm_to.meta_value (p.post_type = 'fep_message' , uf.user_login = 'myname' or p.post_type = 'fep_message' , ut.user_login = 'myname') , pm_delete.post_id null , p.post_date >= '2017-07-07 00:00:00'   , p.post_date <= '2017-08-12 23:59:59' order p.post_date

the result produces is:

id     |post_date              |post_title     |from_login     |to_login     1692    2017-07-07 11:45:03     c               myname          theirname    1698    2017-07-08 16:28:18     b               myname          theirname    2258    2017-08-11 23:15:10                   theirname       myname   2262    2017-08-12 16:48:05     re:a            myname          theirname

the result expected is:

id     |post_date              |post_title     |from_login     |to_login     1698    2017-07-08 16:28:18     b               myname          theirname    2258    2017-08-11 23:15:10                   theirname       myname   2262    2017-08-12 16:48:05     re:a            myname          theirname

what may doing wrong , how can fix it?


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