我希望能够按名称搜索用户,并仅针对以下内容获取结果:
我有一个成功完成第1部分的查询:
SELECT u.id, first_name, last_name
FROM user u
JOIN friend f
ON (
( f.requester_id = u.id AND f.recipient_id = :my_user_id )
OR ( f.recipient_id = u.id AND f.requester_id = :my_user_id )
AND confirmed = 1
)
AND (
( first_name LIKE :search_input OR last_name LIKE :search_input )
OR ( CONCAT ( first_name, ' ', last_name ) LIKE :search_input )
)
AND NOT u.id = :my_user_id
ORDER BY last_name
LIMIT 5
努力弄清楚如何添加第2部分。表格如下:
USER
id | first_name | last_name
-- | ---------- | ---------
0 | John | Doe
1 | Jane | Doe
2 | Bob | Smith
3 | Mike | Jones
FRIEND
id | requester_id | recipient_id | confirmed
-- | ------------ | ------------ | ---------
0 | 0 | 1 | 1
1 | 3 | 1 | 1
2 | 2 | 3 | 1
3 | 1 | 2 | 1
USER_EVENT
id | user_id | event_id
-- | ------- | --------
0 | 0 | 43
1 | 0 | 846
2 | 0 | 1058
3 | 1 | 846
4 | 1 | 912
5 | 2 | 537
6 | 3 | 846
查询可能获得的示例数据:
:search_input (e.g. '%bob%')
:my_user_id (e.g. 3)
:event_id (e.g. 846)
答案 0 :(得分:5)
您只需在查询中添加另一个子句:AND user_id NOT IN (SELECT user_id from USER_EVENT where event_id = :event_id)
完整查询:
SELECT u.id, first_name, last_name
FROM user u
JOIN friend f
ON (
( f.requester_id = u.id AND f.recipient_id = :my_user_id )
OR ( f.recipient_id = u.id AND f.requester_id = :my_user_id )
AND confirmed = 1
)
AND (
( first_name LIKE :search_input OR last_name LIKE :search_input )
OR ( CONCAT ( first_name, ' ', last_name ) LIKE :search_input )
)
AND NOT u.id = :my_user_id
AND user_id NOT IN (SELECT user_id from USER_EVENT where event_id = :event_id)
ORDER BY last_name
LIMIT 5