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;