MariaDB [sandbox]> CREATE TABLE T(ID INT,REQUESTID INT, SID INT);
Query OK, 0 rows affected (0.28 sec)
MariaDB [sandbox]>
MariaDB [sandbox]> INSERT INTO T VALUES
-> (1,1,121),(2,1,122),
-> (3,2,121),(4,3,123),
-> (5,3,121),(6,3,125),
-> (7,3,126),(8,4,121),
-> (9,4,122);
Query OK, 9 rows affected (0.06 sec)
Records: 9 Duplicates: 0 Warnings: 0
MariaDB [sandbox]>
MariaDB [sandbox]>
MariaDB [sandbox]> SELECT T.ID,S.* FROM
-> (
-> SELECT REQUESTID ,GROUP_CONCAT(ID),GROUP_CONCAT(SID ORDER BY SID) SID
-> FROM T
-> GROUP BY REQUESTID
->) S
-> JOIN T ON T.REQUESTID = S.REQUESTID
-> WHERE S.SID = '121,122';
+------+-----------+------------------+---------+
| ID | REQUESTID | GROUP_CONCAT(ID) | SID |
+------+-----------+------------------+---------+
| 1 | 1 | 1,2 | 121,122 |
| 2 | 1 | 1,2 | 121,122 |
| 8 | 4 | 8,9 | 121,122 |
| 9 | 4 | 8,9 | 121,122 |
+------+-----------+------------------+---------+
4 rows in set (0.02 sec)
MariaDB [sandbox]>
MariaDB [sandbox]> SELECT T.ID,S.* FROM
-> (
-> SELECT REQUESTID ,GROUP_CONCAT(ID),GROUP_CONCAT(SID ORDER BY SID) SID
-> FROM T
-> GROUP BY REQUESTID
->) S
-> JOIN T ON T.REQUESTID = S.REQUESTID
-> WHERE S.SID = '121';
+------+-----------+------------------+------+
| ID | REQUESTID | GROUP_CONCAT(ID) | SID |
+------+-----------+------------------+------+
| 3 | 2 | 3 | 121 |
+------+-----------+------------------+------+
1 row in set (0.02 sec)
这真的很无助于把你的数据的图像你的问题。为什么?因为我们的回复者有时会尝试使用http://sqlfiddle.com重现您的问题。但是如果我们必须重新输入数据,我们不会尝试。请[编辑]你的问题。获得答案的最佳方法是自己创建sqlfiddle。 –
我已经用小提琴链接更新了我的问题..希望它有帮助 – user2159399