php - There are 3 tables users,winks and favourite -


there 3 table please @ structure

users table

======================   id(users.id) |username | status ---------------------------------- 56           | mark     | 1 ---------------------------------- 57           | john     | 1 ---------------------------------- 58           | lina     | 1 ---------------------------------- 59           | lara     | 1 ---------------------------------- 

winks table

======================   wink_id | from_id(fk users.id) | to_id(fk user.id) | wink_flag -------------------------------------------------------------------------- 1       | 56                        | 57                     | 1 -------------------------------------------------------------------------- 2       | 56                        | 58                     | 1 -------------------------------------------------------------------------- 

favourite table

======================  fav_id  | from_id(fk user.id)  | to_id(fk user.id) | fav_flag  ------------------------------------------------------------------------ 1       | 56                        | 59                      | 1 ------------------------------------------------------------------------ 1       | 56                        | 58                      | 1 ------------------------------------------------------------------------ 

want left join have data this.

=======================================================================   id  |  wink_flag  |  fav_flg | status ------------------------------------ 57  |  1          | null ------------------------------------ 58  |  1          | 1 ------------------------------------ 59  |  null       | 1 ------------------------------------ 

i joining 2 table winks , fav using left join users

  1. query

when result comes user.id <> 56

means when logged in using 56 user.id

then have users row except me here take logged in 56 user.id

result this.

====================================== id  |  wink_flag  |  fav_flg | status ------------------------------------ 57  |  1          | null ------------------------------------ 58  |  1          | 1 ------------------------------------ 59  |  null       | 1 ------------------------------------ 

how can write sql query have above result.

help me.

without left join see demo sql fiddle

select   u.id,   (select      w.wink_flag    winks w    w.to_id = u.id    group w.to_id) wink_flag,   (select      f.fav_flag    favourite  f    f.to_id = u.id    group f.to_id) fav_flag  users u u.id != 56 

Comments

Popular posts from this blog

c# - DetailsView in ASP.Net - How to add another column on the side/add a control in each row? -

javascript - firefox memory leak -

Trying to import CSV file to a SQL Server database using asp.net and c# - can't find what I'm missing -