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