array_avg

array_avg

array_avg

description

Syntax

Array<T> array_avg(arr)

Get the average of all elements in an array (NULL values are skipped). When the array is empty or all elements in the array are NULL values, the function returns NULL.

example

mysql> create table array_type_table(k1 INT, k2 Array<int>) duplicate key (k1)
    -> distributed by hash(k1) buckets 1 properties('replication_num' = '1');
mysql> insert into array_type_table values (0, []), (1, [NULL]), (2, [1, 2, 3]), (3, [1, NULL, 3]);
mysql> select k2, array_avg(k2) from array_type_table;
+--------------+-----------------+
| k2           | array_avg(`k2`) |
+--------------+-----------------+
| []           |            NULL |
| [NULL]       |            NULL |
| [1, 2, 3]    |               2 |
| [1, NULL, 3] |               2 |
+--------------+-----------------+
4 rows in set (0.01 sec)

keywords

ARRAY,AVG,ARRAY_AVG