APPLY_COUNT (ARRAY_COUNT)

Returns the total number of non-null elements in a collection (array or set). To count all elements including nulls, use APPLY_COUNT_ELEMENTS (ARRAY_LENGTH).

Behavior type

Syntax

APPLY_COUNT(collection)

ARRAY_COUNT is a synonym of APPLY_COUNT.

Arguments

collection

Target collection

Null-handling

Null values are not included in the count.

Examples

The array in this example contains six elements, one of which is null:

=> SELECT apply_count(ARRAY[1,NULL,3,7,8,5]);
apply_count
-------------
5
(1 row)