Mysql用多个where子句连接2个表

Question

正在报道我最近的帖子 fetch results using join Mysql

我做了一些尝试。我想要什么

TABLE users
USERID     NAMES     EMAIL 
1          KAT       1@1.com
2          JOHN      2@1.com
3          FIK       3@1.com
4          PET       4@1.com
5          COW       5@1.com


TABLE comunity
COMUNITY_ID  USERID                       FANS
1            1 KAT  #FROM TABLE USERS     3@1.com # FIK IS MY FAN
2            2 JOHN #FROM TABLE USERS     1@1.com # AM FAN OF JOHN
3            1 KAT  #FROM TABLE USERS     5@1.com # COW IS MY FAN
4            4 PET  #FROM TABLE USERS     1@1.com # AM FAN OF PET
5            1 KAT  #FROM TABLE USERS     2@1.com # JOHN IS MY FAN 

我想获取所有在粉丝栏中有我的电子邮件的粉丝我得到它们是这样的 - 这有效

SELECT * FROM  
users u 
INNER JOIN comunity c ON u.USERID = c.USERID
WHERE c.FANS = 'MY USERID - 1' 

现在问题来了

我还想获得通过电子邮件发送给粉丝专栏的用户我是这样做的选择我的 userid = '1' 的粉丝

所以我需要一些修正

SELECT * FROM  
users u 
INNER JOIN comunity c ON u.USERID = c.USERID
WHERE c.FANS = 'MY USERID - 1' 
AND * IN(SELECT c.FANS FROM comunity WHERE c.USERID = 'MY USERID - 1");

Answer 1

您可以尝试此查询:

SELECT * from
(
SELECT * from community where USERID=1 OR FANS='1@1.com'
) c
left join
users u
ON u.USERID = c.USERID;