3.Redis keys 命令

た入场券 2022-07-19 05:25 173阅读 0赞

** Redis keys 命令**

下表给出了与 Redis 键相关的基本命令：

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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 1</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> DEL key 该命令用于在 key 存在是删除 key。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 2</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> DUMP key&nbsp; 序列化给定 key ，并返回被序列化的值。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 3</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> EXISTS key&nbsp; 检查给定 key 是否存在。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 4</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> EXPIRE key&nbsp;seconds 为给定 key 设置过期时间。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 5</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> EXPIREAT key timestamp&nbsp; EXPIREAT 的作用和 EXPIRE 类似，都用于为 key 设置过期时间。 不同在于 EXPIREAT 命令接受的时间参数是 UNIX 时间戳(unix timestamp)。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 6</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> PEXPIRE key milliseconds&nbsp; 设置 key 的过期时间亿以毫秒计。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 7</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> PEXPIREAT key milliseconds-timestamp&nbsp; 设置 key 过期时间的时间戳(unix timestamp) 以毫秒计</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 8</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> KEYS pattern&nbsp; 查找所有符合给定模式( pattern)的 key 。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 9</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> MOVE key db&nbsp; 将当前数据库的 key 移动到给定的数据库 db 当中。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 10</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> PERSIST key&nbsp; 移除 key 的过期时间，key 将持久保持。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 11</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> PTTL key&nbsp; 以毫秒为单位返回 key 的剩余的过期时间。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 12</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> TTL key&nbsp; 以秒为单位，返回给定 key 的剩余生存时间(TTL, time to live)。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 13</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> RANDOMKEY&nbsp; 从当前数据库中随机返回一个 key 。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 14</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> RENAME key newkey&nbsp; 修改 key 的名称</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 15</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> RENAMENX key newkey&nbsp; 仅当 newkey 不存在时，将 key 改名为 newkey 。</td> 
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 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> 16</td> 
 <td style="border:1px solid rgb(212,212,212); margin:0px; padding:7px 5px; font-size:1em; vertical-align:top"> TYPE key&nbsp; 返回 key 所储存的值的类型。</td> 
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