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SDIFF

Returns the members of the set resulting from the difference between the first set and all the successive sets.

Syntax​

SDIFF key [key ...]

Details​

  • Available since: 1.0.0
  • Time complexity: O(N) where N is the total number of elements in all given sets.
  • ACL categories: @read, @set, @slow

Example​

Assume we have three sets: set1, set2, and set3 with the following members:

SADD set1 "a" "b" "c"
SADD set2 "b" "c" "d"
SADD set3 "c" "d" "e"

Now, let's find the difference between set1 and set2:

SDIFF set1 set2

This will output:

1) "a"

RESP2/RESP3 Reply​

Array reply: list of members in the resulting set.