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SADD

Last updated 
SADD key member [member ...]
Group
Set
Complexity
O(1) for each member added
Arity
-3 (at least 3 words, counting the command name)
Flags
write, fast
Keys
first 1, last 1, step 1
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SADD adds each member to the set stored at key, creating the set if the key does not exist. Members that are already in the set are ignored.

Return value

Section titled “Return value”
Case RESP2 RESP3
Success Integer: the number of members that were newly added Same

SADD replies with a WRONGTYPE error if key holds a value that is not a set.

Examples

Section titled “Examples”
127.0.0.1:6379> SADD tags "redis" "cache" "db"
(integer) 3
127.0.0.1:6379> SADD tags "cache" "kv"
(integer) 1
127.0.0.1:6379> SCARD tags
(integer) 4

Compatibility

Section titled “Compatibility”

Same as Redis 7.4 and Valkey 8.

See also

Section titled “See also”

SREM, SMEMBERS, SISMEMBER, SCARD