redis之Set(无序)类型常用方法总结
redis之Set(无序)类型常用方法总结
存--sadd key member [member ...]
取--SMEMBERS key
sadd key member [member ...] 向集合添加一个或多个成员
127.0.0.1:6379> sadd lt zhangsan lishi wangwu
(integer) 3
127.0.0.1:6379> smembers lt
1) "wangwu"
2) "lishi"
3) "zhangsan"
smembers key 获取一个key对应的集合元素
127.0.0.1:6379> sadd lt zhangsan lishi wangwu
(integer) 3
127.0.0.1:6379> smembers lt
1) "wangwu"
2) "lishi"
3) "zhangsan"
scard key 获取集合的成员数
127.0.0.1:6379> sadd lt zhangsan lishi wangwu
(integer) 3
127.0.0.1:6379> smembers lt
1) "wangwu"
2) "lishi"
3) "zhangsan"
127.0.0.1:6379> scard lt
(integer) 3
sdiff key1 [key2] 返回给定所有集合的差集
127.0.0.1:6379> sadd lt zhangsan lishi wangwu
(integer) 3
127.0.0.1:6379> smembers lt
1) "wangwu"
2) "lishi"
3) "zhangsan"
127.0.0.1:6379> scard lt
(integer) 3
127.0.0.1:6379> sadd plf lishi wangwu jia yi
(integer) 4
127.0.0.1:6379> SDIFF plf lt
1) "yi"
2) "jia"
127.0.0.1:6379> SDIFF lt plf
1) "zhangsan"
SDIFFSTORE destination key1 [key2] 返回给定所有集合的差集并存储在 destination 中
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"
SINTER key1 [key2] 返回给定所有集合的交集
127.0.0.1:6379> sadd lt zhangsan lishi wangwu
(integer) 3
127.0.0.1:6379> sadd plf lishi wangwu jia yi
(integer) 4
127.0.0.1:6379> sinter plf lt
1) "wangwu"
2) "lishi"
SINTERSTORE destination key1 [key2] 返回给定所有集合的交集并存储在 destination 中
redis 127.0.0.1:6379> SADD myset1 "hello"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "foo"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "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> SINTERSTORE myset myset1 myset2
(integer) 1
redis 127.0.0.1:6379> SMEMBERS myset
1) "hello"
SISMEMBER key member 判断 member 元素是否是集合 key 的成员
redis 127.0.0.1:6379> SADD myset1 "hello"
(integer) 1
redis 127.0.0.1:6379> SISMEMBER myset1 "hello"
(integer) 1
redis 127.0.0.1:6379> SISMEMBER myset1 "world"
(integer) 0
SMEMBERS key 返回集合中的所有成员
redis 127.0.0.1:6379> SADD myset1 "hello"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "world"
(integer) 1
redis 127.0.0.1:6379> SMEMBERS myset1
1) "World"
2) "Hello"
SMOVE source destination member 将 member 元素从 source 集合移动到 destination 集合
redis 127.0.0.1:6379> SADD myset1 "hello"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "world"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "bar"
(integer) 1
redis 127.0.0.1:6379> SADD myset2 "foo"
(integer) 1
redis 127.0.0.1:6379> SMOVE myset1 myset2 "bar"
(integer) 1
redis 127.0.0.1:6379> SMEMBERS myset1
1) "World"
2) "Hello"
redis 127.0.0.1:6379> SMEMBERS myset2
1) "foo"
2) "bar"
SPOP key 移除并返回集合中的一个随机元素
redis> SADD myset "one"
(integer) 1
redis> SADD myset "two"
(integer) 1
redis> SADD myset "three"
(integer) 1
redis> SPOP myset
"one"
redis> SMEMBERS myset
1) "three"
2) "two"
redis> SADD myset "four"
(integer) 1
redis> SADD myset "five"
(integer) 1
redis> SPOP myset 3
1) "five"
2) "four"
3) "two"
redis> SMEMBERS myset
1) "three"
redis>
SRANDMEMBER key [count] 返回集合中一个或多个随机数
redis 127.0.0.1:6379> SADD myset1 "hello"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "world"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "bar"
(integer) 1
redis 127.0.0.1:6379> SRANDMEMBER myset1
"bar"
redis 127.0.0.1:6379> SRANDMEMBER myset1 2
1) "Hello"
2) "world"
SREM key member1 [member2] 移除集合中一个或多个成员
redis 127.0.0.1:6379> SADD myset1 "hello"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "world"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "bar"
(integer) 1
redis 127.0.0.1:6379> SREM myset1 "hello"
(integer) 1
redis 127.0.0.1:6379> SREM myset1 "foo"
(integer) 0
redis 127.0.0.1:6379> SMEMBERS myset1
1) "bar"
2) "world"
SUNION key1 [key2] 返回所有给定集合的并集
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> SUNION key1 key2
1) "a"
2) "c"
3) "b"
4) "e"
5) "d"
redis>
SUNIONSTORE destination key1 [key2]所有给定集合的并集存储在 destination 集合中
redis 127.0.0.1:6379> SADD myset1 "hello"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "world"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "bar"
(integer) 1
redis 127.0.0.1:6379> SADD myset2 "hello"
(integer) 1
redis 127.0.0.1:6379> SADD myset2 "bar"
(integer) 1
redis 127.0.0.1:6379> SUNIONSTORE myset myset1 myset2
(integer) 1
redis 127.0.0.1:6379> SMEMBERS myset
1) "bar"
2) "world"
3) "hello"
4) "foo"
SSCAN key cursor [MATCH pattern] [COUNT count] 迭代集合中的元素
redis 127.0.0.1:6379> SADD myset1 "hello"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "hi"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "bar"
(integer) 1
redis 127.0.0.1:6379> sscan myset1 0 match h*
1) "0"
2) 1) "hello"
2) "h1"
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