GROUP_ARRAY_INTERSECT

説明

入力配列のすべての行にわたって共通要素を計算し、新しい配列を返します。

構文

GROUP_ARRAY_INTERSECT(<expr>)

パラメータ

パラメータ	説明
<expr>	積集合が必要な配列列または配列値

戻り値

積集合結果を含む配列を返します

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