[英]MySQL Join Query { How to get following Result }
Table 1 表格1
+----------+
|id | data |
+----------+
|1 | USRA |
+----------+
|4 | USRB |
+----------+
Table 2 表2
+----------+
|cid | mid |
+----------+
|1 | 4 |
+----------+
|4 | 1 |
+----------+
Result Table 结果表
+----------------------+
|table1_id | table2_id |
+----------------------+
|USRA | USRB |
+----------------------+
|USRB | USRA |
+----------------------+
SELECT
a.data,
b.data
FROM
Table1 a
INNER JOIN
Table2 t2
ON a.id = t2.cid
INNER JOIN
Table1 b
ON b.id = t2.mid
Try: 尝试:
SELECT t1.data, t3.data
FROM tab1 t1, tab2 t2, tab1 t3
WHERE t1.id = t2.id
AND t3.id = t2.mid
SELECT t3.data, t1.data
FROM a t1, b t2, a t3
WHERE t1.id = t2.cid
AND t3.id = t2.mid
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.