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"]
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