常用redis操作命令: 1、手动抓取快照,save或者bgsave(后台异步) redis> save OK redis> bgsave Background saving started 2、获取某个key的类型 redis> type mylist list 3、匹配所有符合模式的key,*代表所有 redis> keys * 1) "name" 2) "mylist" 4、随机返回一个key, redis> randomkey "mylist" 5、重命名一个key, redis> rename name myname OK redis> keys * 1) "myname" 2) "mylist" 6、list的一些操作, 将一个值添加到列表的首部, redis> rpush company taobao (integer) 1 redis> lrange company 0 1 1) "taobao" 将一个值添加到列表的尾部, redis> lpush company sina (integer) 2 redis> lrange company 0 1 1) "sina" 2) "taobao" 获得列表长度, redis> llen company (integer) 2 返回list中某个范围的值,模式LRANGE key start end redis> lrange company 1 2 1) "taobao" 2) "sohu" 只保留list中某个范围的值,模式LTRIM key start end redis> lrange company 0 2 1) "sina" 2) "taobao" 3) "sohu" redis> ltrim company 0 1 OK redis> lrange company 0 2 1) "sina" 2) "taobao" 获得list中某个索引号的值,模式LINDEX key index redis> lrange company 0 4 1) "baidu" 2) "sohu" 3) "sina" 4) "taobao" redis> lindex company 2 "sina" redis> lindex company 0 "baidu" 设置list中某个索引位置的值,模式LSET key index value redis> lrange company 0 4 1) "baidu" 2) "sohu" 3) "sina" 4) "taobao" redis> lset company 2 google OK redis> lrange company 0 4 1) "baidu" 2) "sohu" 3) "google" 4) "taobao" 用lpop获取list中索引最小的值(头部值),rpop获取list中索引最大的值(尾部值),注意获取之后list中就不再有这个值了。 redis> lrange company 0 4 1) "baidu" 2) "sohu" 3) "google" 4) "taobao" redis> lpop company "baidu" redis> rpop company "taobao" redis> lrange company 0 4 1) "sohu" 2) "google" 特别注意:以上这些命令中的start或者index都是从0开始计算的 7、集合的一些操作 向集合中增加一个元素,模式SADD key member redis> sadd class kongxing (integer) 1 redis> type class set 列出集合中的所有元素,注意元素是无序的,模式SMEMBERS key redis> smembers class 1) "banqiao" 2) "rulong" 3) "changjie" 4) "kongxing" 从集合中删除一个元素,模式SREM key member redis> srem class kongxing (integer) 1 redis> smembers class 1) "banqiao" 2) "rulong" 3) "changjie" 返回集合大小,模式SCARD key redis> scard class (integer) 3 判断某个值是否在集合中,模式SISMEMBER key member redis> sismember class kongxing (integer) 0—表示没有’kongxing’这个元素 redis> sismember class rulong (integer) 1—表示存在’rulong’这个元素 获取多个集合的交集元素,模式SINTER key1 key2 ... keyN redis> smembers dba 1) "rulong" 2) "changjie" redis> smembers class 1) "banqiao" 2) "rulong" 3) "kongxing" 4) "changjie" redis> sinter class dba 1) "rulong" 2) "changjie" redis> sinter dba class 1) "rulong" 2) "changjie" ---注意:取交集,所以与各个key的位置无关 |
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