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

1. 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"
   

2. 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"
   

3. 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
   

4. 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"
   

5. 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"
   

6. 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"
   

7. 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"
   

8. 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
   

9. 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"
   

10. 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"
    

11. 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>
    

12. 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"
    

13. 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"
    

14. 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>
    

15. 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"
    

16. 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"