Redis常用命令-键值相关命令

1.键值相关命令

* keys

返回满足给定pattern的所有key

127.0.0.1:6379> keys *
1) "key6"
2) "key4"
3) "key1"
4) "myset1"
5) "myzset"
6) "list4"
7) "email"
8) "key3"
9) "myset5"
10) "list3"
11) "list6"
12) "list2"
13) "list5"
14) "list1"
15) "user:001"
16) "key2"
17) "myset3"
18) "user:003"
19) "name"
127.0.0.1:6379> keys my*
1) "myset1"
2) "myzset"
3) "myset5"
4) "myset3"

exists

确认一个key是否存在

127.0.0.1:6379> exists  name
(integer) 1
127.0.0.1:6379> exists  age
(integer) 0

del

删除一个键

127.0.0.1:6379> del name
(integer) 1
127.0.0.1:6379> exists  age
(integer) 0
127.0.0.1:6379> exists  name
(integer) 0

expire

设置一个键的过期时间

127.0.0.1:6379> set age 20
OK
127.0.0.1:6379> get age
"20"
127.0.0.1:6379> expire age 10
(integer) 1
127.0.0.1:6379> ttl age
(integer) 8
127.0.0.1:6379> ttl age
(integer) 5
127.0.0.1:6379> ttl age
(integer) 3
127.0.0.1:6379> ttl age
(integer) 2
127.0.0.1:6379> ttl age
(integer) -2
127.0.0.1:6379> exists age
(integer) 0
127.0.0.1:6379> get age
(nil)

move

将key移动到其他数据库(自带0-15个数据库)

127.0.0.1:6379[1]> select 0
OK
127.0.0.1:6379> keys *
1) "key6"
2) "key4"
3) "key1"
4) "myset1"
5) "myzset"
6) "list4"
7) "email"
8) "key3"
9) "myset5"
10) "list3"
11) "list6"
12) "list2"
13) "list5"
14) "list1"
15) "user:001"
16) "key2"
17) "myset3"
18) "user:003"
127.0.0.1:6379> get age
(nil)
127.0
4000
.0.1:6379> set age 20
OK
127.0.0.1:6379> move age 1
(integer) 1
127.0.0.1:6379> exists age
(integer) 0
127.0.0.1:6379> select 1
OK
127.0.0.1:6379[1]> keys *
1) "age"
127.0.0.1:6379[1]> get age
"20"

persist

移除给定key的过期时间

127.0.0.1:6379> set age 20
OK
127.0.0.1:6379> expire age 10
(integer) 1
127.0.0.1:6379> ttl age
(integer) 8
127.0.0.1:6379> ttl age
(integer) 7
127.0.0.1:6379> persist age
(integer) 1
127.0.0.1:6379> ttl age
(integer) -1
127.0.0.1:6379> ttl age
(integer) -1
127.0.0.1:6379> get age
"20"

randomkey

随机返回一个key

127.0.0.1:6379> randomkey
"list1"
127.0.0.1:6379> randomkey
"myset3"
127.0.0.1:6379> randomkey
"list1"

rename

重命名一个key

rename key2 key2222

type

返回key的数据类型

127.0.0.1:6379> type key1
string
127.0.0.1:6379> type user:001
hash
127.0.0.1:6379> type list2
list
127.0.0.1:6379> type myset1
set
127.0.0.1:6379> type myzset
zset