set_union()

Applies to: ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel

Returns a dynamic array of the set of all distinct values that are in any of the arrays - (arr1 ∪ arr2 ∪ ...).

set_union(set1, set2 [, set3, ...])

Learn more about syntax conventions.

Returns a dynamic array of the set of all distinct values that are in any of arrays.

range x from 1 to 3 step 1
| extend y = x * 2
| extend z = y * 2
| extend w = z * 2
| extend a1 = pack_array(x,y,x,z), a2 = pack_array(x, y), a3 = pack_array(w)
| project a1,a2,a3,Out=set_union(a1, a2, a3)

Output

datatable (Arr1: dynamic)
[
    dynamic(['A4', 'A2', 'A7', 'A2']), 
    dynamic(['C4', 'C7', 'C1', 'C4'])
] 
| extend Out=set_union(Arr1, Arr1)

Output

• set_intersect()
• set_difference()