Redis Sdiffstore 命令
Redis 教程
· 2019-03-07 16:59:26
Redis Sdiffstore 命令将给定集合之间的差集存储在指定的集合中。如果指定的集合 key 已存在，则会被覆盖。
语法
redis Sdiffstore 命令基本语法如下：
redis 127.0.0.1:6379> SDIFFSTORE DESTINATION_KEY KEY1..KEYN
可用版本
>= 1.0.0
返回值
结果集中的元素数量。
实例
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"
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