Redis 学习之数据类型
1、 sadd：向key对应的set集合中添加元素，返回1表示添加成功，返回0 表示失败127.0.0.1:6379> sadd myset1 one
(integer)
1
127.0.0.1:6379> sadd myset1 two
(integer) 1
2、Smembers：查看set集合中的元素
127.0.0.1:6379> smembers myset1
1) "two"
2) "one"
3、srem：删除key对应set集合中的元素，返回1表示删除成功 0表示失败
127.0.0.1:6379> srem myset1 two
(integer) 1
4、spop：随机删除set中的一个元素并返回该元素
127.0.0.1:6379> smembers myset1
1) "three"
2) "one"
3) "four"
127.0.0.1:6379> spop myset1
"four"
127.0.0.1:6379> smembers myset1
1) "three"
2) "one"
5、sdiff：返回给定set集合的差集 （以在前的set集合为标准）
127.0.0.1:6379> smembers myset1
1) "three"
2) "one"
127.0.0.1:6379> smembers myset2
1) "two"
2) "one"
127.0.0.1:6379> sdiff myset1 myset2
1) "three"
127.0.0.1:6379> sdiff myset2 myset1
1) "two"
6、sdiffstore：返回所有给定set集合的差集，并将差集添加到另外一个集合中
127.0.0.1:6379> smembers myset1
1) "three"
2) "one"
127.0.0.1:6379> smembers myset2
1) "two"
2) "one"
127.0.0.1:6379> sdiffstore myset3 myset1 myset2
(integer) 1
127.0.0.1:6379> smembers myset3
1) "three"
7、sinter：返回所有给定集合的交集
127.0.0.1:6379> smembers myset1
1) "three"
2) "one"
127.0.0.1:6379> smembers myset2
1) "two"
2) "one"
127.0.0.1:6379> sinter myset1 myset2
1) "one"
8、sinterstore：返回所有给定集合key的交集，并将结果存为另一个key
127.0.0.1:6379> smembers myset1
1) "three"
2) "one"
127.0.0.1:6379> smembers myset2
1) "two"
2) "one"
127.0.0.1:6379> sinterstore myset4 myset1myset2
(integer) 1
9、返回所有给定集合的并集
127.0.0.1:6379> smembers myset1
1) "three"
2) "one"
127.0.0.1:6379> smembers myset2
1) "two"
2) "one"
127.0.0.1:6379> sunion myset1 myset2
1) "three"
2) "two"
3) "one"
10、sunionstore 返回所有给定集合的并集，并将结果存入另一个集合
127.0.0.1:6379> smembers myset1
1) "three"
2) "one"
127.0.0.1:6379> smembers myset2
1) "two"
2) "one"
127.0.0.1:6379> sunionstore myset5myset1 myset2
(integer) 3
11、smove：从第一个集合中移除元素并将该元素添加到另一个集合中。
127.0.0.1:6379> smembers myset1
1) "three"
2) "one"
127.0.0.1:6379> smembers myset5
1) "three"
2) "two"
3) "one"
127.0.0.1:6379> smove myset5 myset1 two
(integer) 1
127.0.0.1:6379> smembers myset5
1) "three"
2) "one"
127.0.0.1:6379> smembers myset1
1) "three"
2) "two"
3) "one"
12、Scard：返回set集合中元素的个数
127.0.0.1:6379> smembers myset1
1) "three"
2) "two"
3) "one"
127.0.0.1:6379> scard myset1
(integer) 3
13、sismember：测试member元素是否是名称为key的set集合 返回1：表示是 0：不是
127.0.0.1:6379> smembers myset1
1) "three"
2) "two"
3) "one"
127.0.0.1:6379> sismember myset1 tree
(integer) 0
127.0.0.1:6379> sismember myset1 three
(integer) 1
14、srandmember：随机返回set集合中的一个元素，但不删除该元素
127.0.0.1:6379> smembers myset1
1) "three"
2) "two"
3) "one"
127.0.0.1:6379>srandmember myset1
"one"
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