Redis basic Commands

Redis itself does not differentiate between the case of commands, which are all lowercase, and the following are some simple commands.

1.keys (... Get all the key information, if the amount of data is large, will affect performance, output will only output the key name, preceded by an ordinal prefix, parameter support regular.

127.0.0.1:6379>Keys F*1) "Fo"2) "F"127.0.0.1:6379>Keys*1) "Test"2) "Fo"3) "F"

2.exists (...) The test key exists, and there is a return of 1, otherwise 0 is returned.

127.0. 0.1:6379>exists  w (integer0127.0.  0.1:6379>exists  fo (integer1

3.del (...) Delete the command, followed by the key name, delete successfully returned 1, otherwise return 0,del does not support wildcard characters, but can be combined with the system's own ARGX command, for example: Redis-cli keys "*" | Xargs redis-cli del.

127.0. 0.1:6379>  del fo (integer1127.0.  0.1:6379>  del fo #已经删除过一次了, then delete will return 0. (integer0

4.type (...) View the type of the key and return none if it does not exist.

127.0. 0.1:6379>  type fstring127.0. 0.1:6379>  type Fonone

The 5.set/get setting gets the information and returns nil if it does not exist.

127.0. 0.1:6379>set  t1 tOK127.0. 0.1:6379>  get T1 "T"127.0. 0.1:6379>  get T2 (nil)

6.INCR (...) to increment the numeric string and return the incremented value, if there are multiple client operations on the same one, Redis guarantees that the operation is atomic and does not cause concurrency problems.

127.0.0.1:6379> SetT11OK127.0.0.1:6379>Get T1 "1"127.0.0.1:6379>incr T1 (integer)2127.0.0.1:6379>Get T1 "2"

7.append (...) Append to tail

127.0.0.1:6379>get F "1"127.0.0.1:6379>append f lll (integer)4127.0.0.1:6379>get F "1lll"

8.strlen (...)

127.0. 0.1:6379>  strlen F (integer4

9.mset (...) /mget (...) Gets the setting of multiple key values.

127.0.0.1:6379>Mset F11F22F33OK127.0.0.1:6379>mget F1 F2 f31) "1"2) "2"3) "3"

Redis basic Commands