Common operations of keys in Redis (code)

The content this article brings to you is about the common operations (code) of keys in Redis. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Enter the directory: cd /usr/local/redis/

Start the service: ./bin/redis-server ./redis.conf

Enter: ./bin/ redis-cli

(1) View keys: keys *

View all keys: 127.0.0.1:6379> keys *

127.0.0.1:6379> keys *
 1) "myb1"
 2) "mya1"
 3) "mya2"
 4) "my3"
 5) "myhash"
 6) "mylist2"
 7) "num2"
 8) "my1"
 9) "num"
10) "mylist3"
11) "mya3"
12) "name"
13) "myb3"
14) "mylist"
15) "my2"
16) "num3"
17) "imooc"
18) "num5"
19) "mylist4"
20) "myb2"
21) "myset"
22) "mysort"

(2) View keys starting with any character: keys string?

Query keys starting with my: keys my?

127.0.0.1:6379> keys my?
1) "my3"
2) "my1"
3) "my2"

(3) Delete key: del

Delete key: del my1 my2 my3

127.0.0.1:6379> del my1 my2 my3
(integer) 3

(4) Check whether the key exists exists

Check whether it exists, 1 represents existence, 0 represents non-existence: exists my1

127.0.0.1:6379> exists my1
(integer) 0
127.0.0.1:6379> exists num3
(integer) 1

(5) Rename the key: rename

Rename the key operation: rename original key name new Key name

127.0.0.1:6379> get num
"36"
127.0.0.1:6379> rename num newnum
OK
127.0.0.1:6379> get newnum
"36"

(6) Set expiration time: expire

Set expiration time: expire key name seconds

127.0.0.1:6379> expire newnum 1000
(integer) 1

( 7) Check the remaining time of the key: ttl

Check the remaining time of the key: ttl key name. If it is not set, a negative value will be returned.

127.0.0.1:6379> expire newnum 1000
(integer) 1
127.0.0.1:6379> ttl newnum
(integer) 885

(8) Determine the type of key: type

Determine the type of key: type name of key.

127.0.0.1:6379> type newnum
string
127.0.0.1:6379> type my1
none
127.0.0.1:6379> type myhash
hash
127.0.0.1:6379> type mylist4
list
127.0.0.1:6379> type mysort
zset

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