Generates an array containing all elements that appear in multiple input arrays, referenced as column names or array literals.
Basic Usage
Array literal reference example:
derive type:single value:ARRAYINTERSECT([["A","B","C"],["A","D","E"]] )
Output: Generates a single array with a single element:
["A"]
Column reference example:
derive type:single value:ARRAYINTERSECT([array1,array2]) as:'intersect_Array'
Output: Generates a new intersect_Array
column containing a single array listing all of the elements that appear in both array1
and array2
in order .
Syntax and Arguments
derive type:single value:ARRAYINTERSECT (array_ref1,array_ref2)
Argument | Required? | Data Type | Description |
---|---|---|---|
array_ref1 | Y | string or array | Name of first column or first array literal to apply to the function |
array_ref2 | Y | string or array | Name of second column or second array literal to apply to the function |
For more information on syntax standards, see Language Documentation Syntax Notes.
array_ref1, array_ref2
Array literal or name of the array column whose intersection you want to derive. You can intersect two or more array columns together.
Usage Notes:
Required? | Data Type | Example Value |
---|---|---|
Yes | Array literal or column reference | myArray1 , myArray2 |
Tip: For additional examples, see Common Tasks.
Examples
Example - Simple intersection example
Source: Code formatting has been applied to improve legibility. Transform: You can apply the following transforms in the following order. Note that the column names must be different from the transform name, which is a reserved word.
derive type:single value:ARRAYCONCAT([Letters,Numerals]) as:'concat2'
derive type:single value:ARRAYINTERSECT([Letters,Numerals]) as:'intersection2'
derive type:single value:ARRAYCROSS([Letters,Numerals]) as:'cross2'
derive type:single value:ARRAYUNIQUE([Letters,Numerals]) as:'unique2'
Results: For display purposes, the results table has been broken down into three separate sets of columns. Column set 1: Column set 2: Column set 3:ARRAYCONCAT
- Concatenate multiple arrays together. See ARRAYCONCAT Function.ARRAYINTERSECT
- Find the intersection of elements between multiple arrays. See ARRAYINTERSECT Function.ARRAYCROSS
- Compute the cross product of multiple arrays. See ARRAYCROSS Function.ARRAYUNIQUE
- Generate unique values across multiple arrays. See ARRAYUNIQUE Function.Item ArrayA ArrayB Item1 ["A","B","C"]
["1","2","3"]
Item2 ["A","B"]
["A","B","C"]
Item3 ["D","E","F"]
["4","5","6"]
Item ArrayA ArrayB concat2 intersection2 Item1 ["A","B","C"]
["1","2","3"]
["A","B","C","1","2","3"]
[ ]
Item2 ["A","B"]
["A","B","C"]
["A","B","A","B","C"]
["A","B"]
Item3 ["D","E","F"]
["4","5","6"]
["D","E","F","4","5","6"]
[ ]
Item cross2 Item1 [["A","1"],["A","2"],["A","3"],["B","1"],["B","2"],["B","3"],["C","1"],["C","2"],["C","3"]]
Item2 [["A","A"],["A","B"],["A","C"],["B","A"],["B","B"],["B","C"]]
Item3 [["D","4"],["D","5"],["D","6"],["E","4"],["E","5"],["E","6"],
["F","4"],["F","5"],["F","6"]]
Item unique2 Item1 ["A","B","C","1","2","3"]
Item2 ["A","B","C"]
Item3 ["D","E","F","4","5","6"]
This page has no comments.