APPLY_SUM
Computes the sum of all elements in a of numeric values (INTEGER, FLOAT, NUMERIC, or INTERVAL).
	Computes the sum of all elements in a collection (array or set) of numeric values (INTEGER, FLOAT, NUMERIC, or INTERVAL).
Behavior type
ImmutableSyntax
APPLY_SUM(collection)
Arguments
- collection
- Target collection
Null-handling
The following cases return NULL:
- 
if the input collection is NULL 
- 
if the input collection contains only null values 
- 
if the input collection is empty 
Examples
=> SELECT apply_sum(ARRAY[12.5,3,4,1]);
apply_sum
-----------
      20.5
(1 row)