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"] |
+----------------------------+