Redis Sdiffstore Command

Redis Sets (Set)

The Redis Sdiffstore command stores the difference set between the given sets in the specified set. If the specified set key already exists, it will be overwritten.

Syntax

The basic syntax of the redis Sdiffstore command is as follows:

redis　127.0.0.1:6379> SDIFFSTORE DESTINATION_KEY KEY1..KEYN

Available Version

>= 1.0.0

Return Value

Number of elements in the result set.

Online Examples

redis　127.0.0.1:6379> SADD myset "hello"
(integer)　1
redis　127.0.0.1:6379> SADD myset "foo"
(integer)　1
redis　127.0.0.1:6379> SADD myset "bar"
(integer)　1
redis　127.0.0.1:6379> SADD myset2　"hello"
(integer)　1
redis　127.0.0.1:6379> SADD myset2　"world"
(integer)　1
redis　127.0.0.1:6379> SDIFFSTORE destset myset myset2
(integer)　2
redis　127.0.0.1:6379> SMEMBERS destset
1) "foo"
2) "bar"

Redis Sets (Set)