Redis Sets无序集合 存储操作方法
欢迎大家加入 459479177QQ群进行交流这次介绍的是Sets无序集合
老生常谈，使用redis-cli进入我们的redis服务
# redis-cli
127.0.0.1:6379>
1>sadd
方法：sadd key value
描述：往key添加一个或多个value，如果value元素存在则忽略
127.0.0.1:6379> smembers skey1
(empty list or set)
127.0.0.1:6379> sadd skey1 a
(integer) 1
127.0.0.1:6379> smembers skey1
1) "a"
127.0.0.1:6379> sadd skey1 a aa aaa
(integer) 2
127.0.0.1:6379> smembers skey1
1) "a"
2) "aa"
3) "aaa"
2>scard
方法：scard key
描述：统计key有多少个元素，如果key不存在则返回0
127.0.0.1:6379> smembers skey1
1) "a"
2) "aa"
3) "aaa"
127.0.0.1:6379> smembers skey2
(empty list or set)
127.0.0.1:6379> scard skey1
(integer) 3
127.0.0.1:6379> scard skey2
(integer) 0
3>sdiff
方法：sdiff key1 key2 skey3...
描述：sdiff以显示第一个key差异元素，如果第一个key为空集合不存在则为空
127.0.0.1:6379> smembers skey1
1) "a"
2) "aa"
3) "aaa"
127.0.0.1:6379> smembers skey2
1) "22"
2) "a"
3) "1"
4) "11"
127.0.0.1:6379> smembers skey3
1) "22"
2) "a"
3) "2"
127.0.0.1:6379> sdiff skey1 skey2 skey3
1) "aa"
2) "aaa"
127.0.0.1:6379> sdiff skey2 skey1 skey3
1) "1"
2) "11"
127.0.0.1:6379> sdiff skey10 skey2 skey1 skey3 \\这里的skey10不存在
(empty list or set)
4>sdiffstore
方法：sdiffsotre destinationkey key1 key2
描述：destination为后面key1 key2 ...差异存储的指定集合，如果存在则覆盖，以key1为输入元素标本。
127.0.0.1:6379> smembers skey1
1) "a"
2) "aa"
3) "aaa"
127.0.0.1:6379> smembers skey2
1) "22"
2) "a"
3) "1"
4) "11"
127.0.0.1:6379> smembers skey10
(empty list or set)
127.0.0.1:6379> sdiffstore skey10 skey1 skey2
(integer) 2
127.0.0.1:6379> smembers skey1
1) "a"
2) "aa"
3) "aaa"
127.0.0.1:6379> smembers skey2
1) "22"
2) "a"
3) "1"
4) "11"
127.0.0.1:6379> smembers skey10 \\destination存储了以skey1对比skey2的差异元素
1) "aa"
2) "aaa"
5>sinter
方法：sinter key1 key2
描述：取key1与key2交集的成员，如果其中一个key为空，则显示为空
127.0.0.1:6379> smembers skey11
(empty list or set)
127.0.0.1:6379> smembers skey1
1) "a"
2) "aa"
3) "aaa"
127.0.0.1:6379> smembers skey2
1) "22"
2) "a"
3) "1"
4) "11"
127.0.0.1:6379> sinter skey1 skey2
1) "a"
127.0.0.1:6379> sinter skey1 skey11
(empty list or set)
6>sinterstore
方法：sinterstore destinationkey key1 key2...
描述：destination为后面key1 key2 ...交集存储的指定集合，如果存在则覆盖
127.0.0.1:6379> smembers skey1
1) "a"
2) "aa"
3) "aaa"
127.0.0.1:6379> smembers skey2
1) "22"
2) "a"
3) "1"
4) "11"
127.0.0.1:6379> smembers skey3
1) "22"
2) "a"
3) "2"
127.0.0.1:6379> smembers skey10 \\这里的元素有俩个aa跟aaa
1) "aa"
2) "aaa"
127.0.0.1:6379> smembers skey11
(empty list or set)
127.0.0.1:6379> sinterstore skey11 skey1 skey2 skey3
(integer) 1
127.0.0.1:6379> smembers skey11
1) "a"
127.0.0.1:6379> sinterstore skey10 skey1 skey2 skey3 \\使用存在的会覆盖，结构就剩下a
(integer) 1
127.0.0.1:6379> smembers skey10
1) "a"
7>sismember
方法：sismeber key value
描述：判断vale是否为key元素，如果是则返回1，否则返回0
127.0.0.1:6379> smembers skey10
1) "a"
127.0.0.1:6379> sismember skey10 a
(integer) 1
127.0.0.1:6379> sismember skey10 aaa
(integer) 0
8>smembers
方法：smembers key {官方给的是smembers key value是错的}
127.0.0.1:6379> smembers skey10 a \\这段是官方给的方法
(error) ERR wrong number of arguments for 'smembers' command \\直接提示报错
127.0.0.1:6379> smembers skey10 \\正确的方法
1) "a"
127.0.0.1:6379> smembers skey2
1) "22"
2) "a"
3) "1"
4) "11"
9>smove
方法：smove sourcekey destinationkey member
描述：如果sourcekey为空或不存在，不做任何操作！仅返回0，否则member从sourcekey移除并添加destinationkey中。如果destinationkey存在sourcekey的member，那么将仅仅从sourcekey删除member
127.0.0.1:6379> smembers skey1
1) "a"
2) "aa"
3) "aaa"
127.0.0.1:6379> smembers skey2
1) "22"
2) "a"
3) "1"
4) "11"
127.0.0.1:6379> smove skey1 skey2 a \\俩边都存在a，skey1则删除a，而skey2不做任何修改
(integer) 1
127.0.0.1:6379> smembers skey1
1) "aa"
2) "aaa"
127.0.0.1:6379> smembers skey2
1) "22"
2) "a"
3) "1"
4) "11"
127.0.0.1:6379> smove skey1 skey2 555 \\如果不存在或为空，仅返回0
(integer) 0
127.0.0.1:6379> smove skey1 skey22 aa \\如果skey22不存在，则新建并添加aa至skey22
(integer) 1
127.0.0.1:6379> smembers skey1
1) "aaa"
127.0.0.1:6379> smembers skey22
1) "aa"
127.0.0.1:6379> smove skey1 skey2 aaa
(integer) 1
127.0.0.1:6379> smembers skey1
(empty list or set)
127.0.0.1:6379> smembers skey2
1) "1"
2) "11"
3) "a"
4) "22"
5) "aaa"
10>spop
方法：spop key
描述：随机弹出一个member并显示member
127.0.0.1:6379> smembers skey2
1) "1"
2) "11"
3) "a"
4) "22"
5) "aaa"
127.0.0.1:6379> spop skey2
"11"
127.0.0.1:6379> smembers skey2
1) "a"
2) "22"
3) "1"
4) "aaa"
127.0.0.1:6379> spop skey2
"aaa"
127.0.0.1:6379> smembers skey2
1) "a"
2) "22"
3) "1"
11>srandmember
方法：srandmember key
描述：如果count为正数，小于key基数则指定显示count元素的数字，如果大于则全部显示，如果count为负数，则返回指定count元素的数字并且重复显示当中元素。
127.0.0.1:6379> srandmember skey2 10 \\正数
1) "22"
2) "a"
3) "1"
127.0.0.1:6379> srandmember skey2 1
1) "a"
127.0.0.1:6379> smembers skey2
1) "a"
2) "22"
3) "1"
127.0.0.1:6379> srandmember skey2 -1 \\负数
1) "a"
127.0.0.1:6379> srandmember skey2 -2
1) "1"
2) "a"
127.0.0.1:6379> srandmember skey2 -10
1) "1"
2) "22"
3) "1"
4) "1"
5) "22"
6) "1"
7) "a"
8) "1"
9) "22"
10) "1"
12>srem
方法：srem key member1 member2...
描述：移除一个或多个集合元素，不存在则忽略
127.0.0.1:6379> smembers skey2
1) "a"
2) "22"
3) "1"
127.0.0.1:6379> srem skey2 a 22
(integer) 2
127.0.0.1:6379> smembers skey2
1) "1"
13>sunion
方法： sunion key1 key2 key3...
描述：显示指定集合的并集，key不存在视为空
127.0.0.1:6379> smembers skey1 \\空不存在或者空
(empty list or set)
127.0.0.1:6379> smembers skey2
1) "1"
127.0.0.1:6379> smembers skey3
1) "22"
2) "a"
3) "2"
127.0.0.1:6379> sunion skey1 skey2 skey3
1) "a"
2) "22"
3) "1"
4) "2"
14>sunionstore
方法：sunionstore destinationkey key1 key2..
描述：显示指定集合的并集，并且把结果存储至destinationkey。
127.0.0.1:6379> smembers skey4
(empty list or set)
127.0.0.1:6379> smembers skey3
1) "22"
2) "a"
3) "2"
127.0.0.1:6379> smembers skey2
1) "1"
127.0.0.1:6379> smembers skey1
(empty list or set)
127.0.0.1:6379> sunionstore skey4 skey1 skey2 skey3
(integer) 4
127.0.0.1:6379> smembers skey4
1) "a"
2) "22"
3) "1"
4) "2"
15>sscan
方法：sscan key {官方的介绍} 是不是很晕？我这边讲下 sscan key 下标(start) match h* (匹配的比如h开头的) count 编号(end就是指smembers看到1)2)3),这样清楚吗,如果count为1，且1)没有匹配到h*，那么会往下匹配至少显示一个，然后就会正常匹配)
描述：用于迭代集合键中元素。
127.0.0.1:6379> smembers skey1
1) "233"
2) "hwww"
3) "hjaj"
4) "hh999"
5) "999"
6) "99kajjw"
7) "h888"
8) "99dd"
127.0.0.1:6379> sscan skey1 0 match h* count 1
1) "4"
2) 1) "hwww"
127.0.0.1:6379> sscan skey1 0 match h* count 2
1) "4"
2) 1) "hwww"
127.0.0.1:6379> sscan skey1 0 match h* count 3 \\一直匹配到这里都是只有一个h*匹配到的
1) "1"
2) 1) "hwww"
127.0.0.1:6379> sscan skey1 0 match h* count 4 \\匹配第4)时就会正常匹配，如果有就出现，没有就显示之前匹配的个数，请仔细观察下面的匹配情况
1) "5"
2) 1) "hwww"
2) "hjaj"
127.0.0.1:6379> sscan skey1 0 match h* count 5
1) "3"
2) 1) "hwww"
2) "hjaj"
3) "hh999"
127.0.0.1:6379> sscan skey1 0 match h* count 6
1) "3"
2) 1) "hwww"
2) "hjaj"
3) "hh999"
127.0.0.1:6379> sscan skey1 0 match h* count 7
1) "0"
2) 1) "hwww"
2) "hjaj"
3) "hh999"
4) "h888"
127.0.0.1:6379> sscan skey1 0 match h* count 8
1) "0"
2) 1) "hwww"
2) "hjaj"
3) "hh999"
4) "h888"
至此，Redis Sets无序集合就介绍完毕啦~
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