GROUP_ARRAY_INTERSECT

描述

求出所有行中输入数组中的交集元素，返回一个新的数组

语法

GROUP_ARRAY_INTERSECT(<expr>)

参数

参数	说明
<expr>	需要求交集的数组列或数组值

返回值

返回一个包含交集结果的数组

举例

select c_array_string from group_array_intersect_test where id in (18, 20);

+------+---------------------------+
| id   | col                       |
+------+---------------------------+
|    1 | ["a", "b", "c", "d", "e"] |
|    2 | ["a", "b"]                |
|    3 | ["a", null]               |
+------+---------------------------+

select group_array_intersect(col) from group_array_intersect_test;

+----------------------------+
| group_array_intersect(col) |
+----------------------------+
| ["a"]                      |
+----------------------------+