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This article introduces the relevant knowledge of "what is the use of the five data types of Redis". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Redis characteristics

Redis supports data persistence. You can save the data in memory on disk and load it again when you restart it.

Redis not only supports simple key-value type data, but also divides value into data structures such as list,set,zset,hash.

Because Redis exchanges data quickly, it is often used to store some data that needs to be fetched frequently in the server to improve efficiency.

Redis data model

Redis supports five data types: string (string), hash (hash), list (list), set (collection) and zset (sorted set: ordered collection).

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String-> string

Hash-> Hash

List-> list

Set-> Collection

Zset-> ordered set

Basic use of Redis

Connect redis:redis-cli

Exit: exit

Operation server: service redis start/stop/restart

Switch database: select n

The use of the five data types of Redis

1. Commands used by global key operations for all five data types

View all key:keys * delete key-value pairs: del key rename: rename key new_key setting expiration time: expire key seconds

2.String Typ

Strings is the most basic data type of redis. One key corresponds to one value.

Set data: set key value view data: get key append data: append key value delete data: del key

3.List Typ

Add data: rpush key value [value...] Lpush key value [value...] Add data to the header to view data: lrange key start stop lindex key index to view a certain data modify data: lset key index value delete data: rpop key lpop key header delete data

4.Hash Typ

Add data: hset key field value View Domain value: hget key field hgetall key View all field and value View all value:hvals key View all field:hkeys key

5.Set Typ

Add data: sadd key member [member...] View data: smembers key random deletion: spop key specified deletion: srem key member [member …]

6.Sorted Set Typ

Add data: zadd key score member [score2 member2...] View data: zrange key start stop zrangebyscore key min max views deleted data through the score value: zrem key member [member...] Delete multiple data through the index: zremrangebyrank key min max zremrangebyscore key min max--  deleted by the score value

Flushall deletes all data

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