左連接查詢錯誤

Question

我有兩個表事件和enrolledevents當一個學生註冊一個事件的studentId和eventId存儲在enrolledevents表 現在我想獲得所有未註冊的事件的學生。

我的表： 事件表

EnrolledEvents

任何一個可以給我我試過很多查詢的查詢，但我沒有得到的結果

SELECT 
    * 
FROM 
    events 
     LEFT JOIN 
    enrolledevents ON events.event_id = enrolledevents.eevent_id 
WHERE 
    event_occurance = 'daily' 
     AND status = '1' 
     AND (enrolledevents.estudent_id NOT IN ('1') 
     AND enrolledevents.eevent_id NOT IN ('3')) 

Answer 1

移動下面WHERE條件到JOIN ON子句

AND (enrolledevents.estudent_id NOT IN ('1') 
    AND enrolledevents.eevent_id NOT IN ('3')) 

像

SELECT 
    * 
FROM 
    events 
     LEFT JOIN 
    enrolledevents ON events.event_id = enrolledevents.eevent_id 
        AND enrolledevents.estudent_id <> '1' 
        AND enrolledevents.eevent_id <> '3' 
WHERE 
    events.event_occurance = 'daily' 
     AND events.status = '1';