set_difference()

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

Returns a dynamic (JSON) array of the set of all distinct values that are in the first array but aren't in other arrays - (((arr1 \ arr2) \ arr3) \ ...).

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

Learn more about syntax conventions.

Returns a dynamic array of the set of all distinct values that are in set1 but aren't in other 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(x,y,w)
| project set_difference(a1, a2, a3)

Output

print arr = set_difference(dynamic([1,2,3]), dynamic([1,2,3]))

Output

• set_union()
• set_intersect()