mysql 查询特定用户的发送和接收消息

Question

I want to make query to extract the send and receive messages under specific user. let suppose I tried to make understand question.

there is list of users and when I click on the user all correspondence data should be come under this specific user.

The query I am using

SELECT id,post_id
     , post_auth_user_id
     , ask_user_id
     , response_user_id
     , message
     , updated_at 
  FROM post_queries 
 WHERE (4 IN (ask_user_id,response_user_id) 
       OR 2 IN (ask_user_id)) 
    OR (ask_user_id=4 AND response_user_id=0)

but this query is not give me appropriate result.

I want to all result like in this format.

id post_id post_auth_user_id ask_user_id response_user_id message updated_at

---

 1        2                  2            3                 0  asking property  2020-10-10 14:09:14   
 3        2                  2            3                 2  yeh response hei  2020-10-10 15:19:14  

Answer 1

If you want messages between two users -- say 2 and 4 -- you can use:

SELECT id, post_id, post_auth_user_id, ask_user_id, response_user_id, message, updated_at
FROM (ask_user_id = 2 AND response_user_id = 4) OR
     (ask_user_id = 4 AND response_user_id = 2) ;