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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                #### keys 遍歷出所有key,類似MySQL的 like . 一般不在生產環境使用 .當Redis存儲的數據量太大的時候,keys 命令會阻塞后面的命令. 插入三條數據 ~~~ keys * ~~~ ~~~ 127.0.0.1:6379> keys * 1) "gender" 2) "age" 3) "name" ~~~ #### dbsize 返回數據庫長度 ~~~ 127.0.0.1:6379> dbsize (integer) 3 ~~~ #### exists key 判斷一個key是否存在, 存在返回1, 不存在返回0 . ~~~ exists kayname ~~~ ~~~ 127.0.0.1:6379> exists haha (integer) 1 ~~~ #### del key [key ...] 成功刪除返回被刪除的key數量, key不存在返回0 . ~~~ del keyname1 keyname2 ~~~ ~~~ 127.0.0.1:6379> del name age (integer) 2 ~~~ #### expire key seconds 設置過期時間為10秒 ~~~ 127.0.0.1:6379> expire name 10 (integer) 1 ~~~ #### ttl 查看key過期時間 , 返回剩余過期時間 . ~~~ ttl keyname ~~~ 返回值 : * -2表示已刪除 * -1表示key存在,但未設置過期時間 #### persist 去除過期時間 ~~~ persist keyname ~~~ #### type key ~~~ type keyname ~~~ ~~~ 127.0.0.1:6379> type name string ~~~ #### 時間復雜度 ![](https://box.kancloud.cn/ad5569d841324f53ce89fa7d2bd619b6_817x449.png)
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