Array functions

ARRAY_JOIN
Concatenates all values into a single string, separated by the separator.
Syntax
ARRAY_JOIN(VALUES, SEPARATOR)
Examples
Values
Separator
Result
"a", "b", "c"
", "
"a, b, c"
5.5
", "
"5.5"
"a", "b", "c"
""
"abc"
ARRAY_MAX
Return the maximum value in an array.
inputs
result
1, 0.2, 30
30
ARRAY_MIN
Return the minimum value in an array.
inputs
result
1, 0.2, 30
0.2
ARRAY_SUM
Sums all the values in the array.
inputs
result
1, 0.2, 30
31.2
CONCAT
Returns an error message indicating that CONCAT has been deprecated.
COUNT_VALUES
Returns the amount of items in a given array.
input
result
​
0
"a", "b", "c"
3
COUNT_VALUES_IF
Returns the amount of true values in a given array.
input
result
​
0
true, false, true
2
DISTINCT_VALUES
Get all the distinct elements in the array.
input
result
1, 2, 3, 4, 4, 1
1, 2, 3, 4
ELEMENT_AT
Gets the element at the given index in the array.
Properties
Index - The index of the item to return
input
Index
result
"a", "b", "c"
1
"b"
"a"
1
null
"a", "b", "c"
-1
null
FIRST_ELEMENT
Gets the first element in the array.
input
result
​
null
"a", "b", "c"
"a"
LAST_ELEMENT
Gets the last element in the array.
input
result
​
null
"a", "b", "c"
"c"
LEAST
Return the minimum value.
input
result
[1, 0.2], [30]
0.2
PRESTO_CONCAT
This function returns the concatenation of the arguments. 
It provides the same functionality as the SQL-standard concatenation operator (||). 
Syntax 
PRESTO_CONCAT(STRING1, STRING2, ..., STRINGN) 
Arguments 
STRING# An expression to concatenate. 
Returns 
The concatenation of the arguments. 
Examples
Strings
Result
"a", "b", "c"
"abc"
"1", "2" , "A", "B"
"12AB"