SDIFF
SDIFF key [key ...]
Returns the members of the set resulting from the difference between the first set and all the successive sets.
For example:
key1 = {a,b,c,d} key2 = {c} key3 = {a,c,e} SDIFF key1 key2 key3 = {b,d}
Keys that do not exist are considered to be empty sets.
Return value
Array reply: list with members of the resulting set.
Examples
redis>
SADD key1 "a"
(integer) 1
redis>
SADD key1 "b"
(integer) 1
redis>
SADD key1 "c"
(integer) 1
redis>
SADD key2 "c"
(integer) 1
redis>
SADD key2 "d"
(integer) 1
redis>
SADD key2 "e"
(integer) 1
redis>
SDIFF key1 key2
1) "b" 2) "a"
© 2009–2020 Salvatore Sanfilippo
Licensed under the Creative Commons Attribution-ShareAlike License 4.0.
https://redis.io/commands/sdiff