我有一个mysql问题,也许标题有点令人困惑,但这里有:
我有两张桌子
TABLE A TABLE B
+-----+--------+ +-----+--------+
| id | NumCol | | id | NumCol |
+-----+--------+ +-----+--------+
| 101 | 123 | | 101 | |
| 101 | 124 | +-----+--------+
+-----+--------+
现在我想在id上加入这两个,所以我得到这样的输出
+-----+--------+
| id | NumCol |
+-----+--------+
| 101 | 123,124|
+-----+--------+
任何人都知道有一种方便的方法吗?
答案 0 :(得分:3)
你有没有尝试过:
SELECT tableA.id, GROUP_CONCAT(tableA.NumCol) as NumCol
FROM tableA, tableB
WHERE tableA.id = tableB.id
GROUP BY tableA.id
答案 1 :(得分:2)
尝试此查询
SELECT tb.id,GROUP_CONCAT(ta.NumCol) AS NumCol FROM tableB AS tb
JOIN tableA AS ta ON ta.id=tb.id
GROUP BY tb.id