1.keys pattern 命令–>获取key值

文中提到redis中允许模糊查询的有3个通配符，分别是：*，?，[]

其中：

*：通配任意多个字符

?：通配单个字符

[]：通配括号内的某一个字符

redis 127.0.0.1:6379> flushdb
OK
redis 127.0.0.1:6379> keys *
(empty list or set)
redis 127.0.0.1:6379> mset one 1 two 2 three 3 four 4
OK
redis 127.0.0.1:6379> keys o*
1) "one"
redis 127.0.0.1:6379> key *o
(error) ERR unknown command 'key'
redis 127.0.0.1:6379> keys *o
1) "two"
redis 127.0.0.1:6379> keys ???
1) "one"
2) "two"
redis 127.0.0.1:6379> keys on?
1) "one"
redis 127.0.0.1:6379> set ons yes
OK
redis 127.0.0.1:6379> keys on[eaw]
1)"one"

2.randomkey–>随机获取key值

127.0.0.1:6379> randomkey
"name"

3.type keyname–>获取某个key中的存储的类型

127.0.0.1:6379> type age
string

4.exists keyname–>判断某个key是否存在

127.0.0.1:6379> exists age
(integer) 1

5.del keyname–>删除某个key值

127.0.0.1:6379> del age
(integer) 1