1、keys(查询Redis所有key)
查询单个key
keys pattern :获取所有与pattern 匹配的key。*表示任意一个或多个字符;?表示一个字符
127.0.0.1:6379> keys *
1) "names"
2) "hehe"
3) "hello"
4) "name"
5) "status"
6) "id"
127.0.0.1:6379> keys name*
1) "names"
2) "name"
127.0.0.1:6379> keys name?
1) "names"
127.0.0.1:6379> keys he[h-l]*
1) "hehe"
2) "hello"
keys命令一般不在生产环境使用,因为Redis是单线程架构,使用不当会导致Redis阻塞。
2.dbsize(查询Redis所有key总数)
127.0.0.1:6379> dbsize
(integer) 6
3.exists key(查询Redis中是否存在key)
127.0.0.1:6379> exists a
(integer) 0
127.0.0.1:6379> exists name
(integer) 1
127.0.0.1:6379> exists name status
(integer) 2
4.del key(删除Redis中key)
127.0.0.1:6379> set name shunli
OK
127.0.0.1:6379> get name
"shunli"
127.0.0.1:6379> del name
(integer) 1
127.0.0.1:6379> get name
(nil)
删除多个
127.0.0.1:6379> del name status
(integer) 2
127.0.0.1:6379> get name
(nil)
127.0.0.1:6379> get status
(nil)
5.expire key seconds(设置Redis key过期时间(单位秒))
ttl key 查看key剩余过期时间
persist key 去掉key的过期时间
127.0.0.1:6379> set hello world
OK
127.0.0.1:6379> expire hello 30
(integer) 1
127.0.0.1:6379> get hello
"world"
127.0.0.1:6379> ttl hello
(integer) 14
127.0.0.1:6379> ttl hello
(integer) -2 //-2 key已经不存在了
127.0.0.1:6379> get hello
(nil)
6、type key(查询Redis key类型)
127.0.0.1:6379> keys *
1) "names"
2) "hehe"
3) "id"
127.0.0.1:6379> type id
string
127.0.0.1:6379> type hello
none