GROUP_ARRAY_INTERSECT
Description
Calculate the intersection elements of the input array across all rows and return a new array.
Syntax
GROUP_ARRAY_INTERSECT(<expr>)Parameters
| Parameter | Description |
|---|---|
<expr> | Array columns or array values that require intersection |
Return Value
Returns an array containing the intersection results
Example
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"] |
+----------------------------+