ARRAY_UNIQUE
Introduced or updated: v1.2.762
Returns the number of unique elements in the array.
Syntax
ARRAY_UNIQUE(array)
Parameters
| Parameter | Description |
|---|---|
| array | The array to analyze for unique elements. |
Return Type
INTEGER
Notes
This function works with both standard array types and variant array types.
Examples
Example 1: Counting Unique Elements in a Standard Array
SELECT ARRAY_UNIQUE([1, 2, 2, 3, 3, 3]);
Result:
3
Example 2: Counting Unique Elements in a Variant Array
SELECT ARRAY_UNIQUE(PARSE_JSON('["apple", "banana", "apple", "orange", "banana"]'));
Result:
3
Example 3: Empty Array
SELECT ARRAY_UNIQUE([]);
Result:
0