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Update redis-all.md

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Original file line number	Diff line number	Diff line change
`@@ -257,7 +257,7 @@ OK`
`257`	`257`	`下面我们简单看看它的使用!`
`258`	`258`
`259`	`259`	```bash
`260`		`-127.0.0.1:6379> hset userInfoKey name "guide" description "dev" age "24"`
	`260`	`+127.0.0.1:6379> hmset userInfoKey name "guide" description "dev" age "24"`
`261`	`261`	`OK`
`262`	`262`	`127.0.0.1:6379> hexists userInfoKey name # 查看 key 对应的 value中指定的字段是否存在。`
`263`	`263`	`(integer) 1`

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