Question

也许你可以帮助我:

如果有一个表1:账户

user_id   account_id   
39        3799207
39        80286966
40        3789458

.

表2:用户

id   client_id  master_id   master_account_id   active 
1    43         39          3799207             1
2    43         39          80286966            1
3    44         39          80286966            1
4    45         39          80286966            1

.

使用此请求 :

 SELECT account_id FROM accounts WHERE user_id = "39" ;

我可以得到这张桌子:

Account
3799207
80286966

这张桌子我怎么拿?

Account      Subscribers     Count
3799207      43              1
80286966     43,44,45.     3

谢谢!

Answer 1

尝试此 :

SELECT a.account_id Account, 
      GROUP_CONCAT(b.client_id) Subscribers,
      COUNT(b.client_id) `Count`
FROM accounts a INNER JOIN subscribers b
    on a.account_id = b.master_account_id
WHERE b.master_id =  39 
GROUP BY a.account_id

MySQl 和 SQLite 内建函数 GROUP_CONCAT , 将列同成行。

HTH, HTH, HTH, HTH, HTH, HTH, HTH, HTH, HT, HTH

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