04_NoSQL数据库之Redis数据库：set类型和zset类型(二)
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127.0.0.1:6379> sdiffstore myset4 myset3 myset2将myset3和myset2的差集存入myset4中
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(integer) 3
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127.0.0.1:6379> smembers myset4
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1) "six"
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2) "five"
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3) "four"
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127.0.0.1:6379>
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sinter:
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返回所有给定key的交集
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sinterstore将取出的差集存入到另外的一个集合中。
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127.0.0.1:6379> sadd myset1 one
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(integer) 1
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127.0.0.1:6379> sadd myset1 two
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(integer) 1
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127.0.0.1:6379> sadd myset2 two
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(integer) 1
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127.0.0.1:6379> sadd myset2 three
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(integer) 1
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127.0.0.1:6379> sadd myset2 four
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(integer) 1
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127.0.0.1:6379> sadd myset2 five
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(integer) 1
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127.0.0.1:6379> sadd myset3 four
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(integer) 1
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127.0.0.1:6379> sadd myset3 five
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(integer) 1
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127.0.0.1:6379> sadd myset3 six
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(integer) 1
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127.0.0.1:6379> sadd myset3 seven
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(integer) 1
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127.0.0.1:6379> smembers myset1
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1) "two"
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2) "one"
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127.0.0.1:6379> smembers myset2
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1) "four"
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2) "three"
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3) "five"
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4) "two"
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127.0.0.1:6379> smembers myset3
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1) "seven"
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2) "four"
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3) "six"
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4) "five"
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127.0.0.1:6379> sinter myset3 myset2
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1) "four"
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2) "five"
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127.0.0.1:6379> sinterstore myset6 myset3 myset2
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(integer) 2
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127.0.0.1:6379> smembers myset6
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1) "four"
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2) "five"
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127.0.0.1:6379>
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sunion:表示插入并集。
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返回所有给定key的并集。
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127.0.0.1:6379> sadd myset1 one
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(integer) 1
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127.0.0.1:6379> sadd myset2 two
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(integer) 1
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127.0.0.1:6379> sadd myset1 two
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(integer) 1
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127.0.0.1:6379> sadd myset2 three
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(integer) 1
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127.0.0.1:6379> sadd myset2 four
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(integer) 1
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127.0.0.1:6379> sunion myset1 myset2 查看并集
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1) "three"
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2) "two"
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3) "four"
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4) "one"
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127.0.0.1:6379> sunionstore myset7 myset1 myset2 将并集的结果存入myset7中
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(integer) 4 //返回值是4表示成功将4个元素插入myset7中
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127.0.0.1:6379> smembers myset1
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1) "two"
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2) "one"
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127.0.0.1:6379> smembers myset2
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1) "three"
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2) "two"
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3) "four"
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127.0.0.1:6379> smembers myset7
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1) "three"
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2) "two"
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3) "four"
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4) "one"
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127.0.0.1:6379>
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smove:从第一个key对应的set中移除member并添加到第二个对应的set中。（将第一个集合中的元素剪切下来放入第二个元素中）
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将smove myset2 myset7 three表示：myset2中的three元素扔到myset7中
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127.0.0.1:6379> smembers myset1
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1) "two"
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2) "one"
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127.0.0.1:6379> smembers myset2
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1) "three"
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2) "two"
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3) "four"
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127.0.0.1:6379> sadd myset1 five
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(integer) 1
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127.0.0.1:6379> smembers myset8
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(empty list or set)
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127.0.0.1:6379> smove myset1 myset8 two 将myset1中的two元素移动到myset8中
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(integer) 1
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127.0.0.1:6379> smembers myset8
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1) "two"
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127.0.0.1:6379> smembers myset1
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1) "five"
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2) "one"
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127.0.0.1:6379>
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scard返回名称为key的set的元素个数。(看集合中的元素个数)
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127.0.0.1:6379> smembers myset1 看myset1集合中的元素有哪些
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1) "five"
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2) "one"
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127.0.0.1:6379> smembers myset2 看myset2集合中的元素有哪些
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1) "three"
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2) "two"
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3) "four"
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127.0.0.1:6379> smembers myset8 看myset8集合中的元素有哪些
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1) "t