SADD key member [member ...]
Available since:
Time complexity:
O(1) for each element added, so O(N) to add N elements when the command is called with multiple arguments.
ACL categories:
@write, @set, @fast,

Add the specified members to the set stored at key. Specified members that are already a member of this set are ignored. If key does not exist, a new set is created before adding the specified members.

An error is returned when the value stored at key is not a set.


Integer reply: the number of elements that were added to the set, not including all the elements already present in the set.


SADD myset "Hello" SADD myset "World" SADD myset "World" SMEMBERS myset


  • Starting with Redis version 2.4.0: Accepts multiple member arguments.
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