MAX_BY

MAX_BY

描述

语法

MAX_BY(expr1, expr2)

返回与 expr2 的最大值关联的 expr1 的值。

举例

MySQL > select * from tbl;
+------+------+------+------+
| k1   | k2   | k3   | k4   |
+------+------+------+------+
|    0 | 3    | 2    |  100 |
|    1 | 2    | 3    |    4 |
|    4 | 3    | 2    |    1 |
|    3 | 4    | 2    |    1 |
+------+------+------+------+

MySQL > select max_by(k1, k4) from tbl;
+--------------------+
| max_by(`k1`, `k4`) |
+--------------------+
|                  0 |
+--------------------+ 

keywords

MAX_BY