What are the commonly used commands in redis?

Redis common commands include: 1. Connection operation command; 2. Persistence command; 3. Remote service control command; 4. Value operation command; 5. String command; 6. List command; 7. Set Command; 8. hash command, etc.

##[Recommended course: redis tutorial]

Redis common commands are:

(1) Connection operation command

• quit: close the connection (connection)

• auth: simple password authentication

• help cmd: View cmd help

(2) Persistence

• save: Save data to disk synchronously

• bgsave: Save data to disk asynchronously

• lastsave: Returns the Unix timestamp of the last time data was successfully saved to disk

• shundown: Synchronously saves data to disk and then shuts down the service

(3) Remote service control

• info: Provides server information and statistics

• monitor: Live dump of received requests

• slaveof: Change replication policy settings

• config: Configure at runtime Redis server

(4) Commands for value operations

• exists(key): Confirm whether a key exists

• del(key): Delete a key

• type(key): The type of return value

• keys(pattern): Returns all keys that satisfy the given pattern

• randomkey: Randomly returns a key in the key space

• rename (oldname, newname): Rename key

• dbsize: Return the number of keys in the current database

• expire: Set an activity for a key Time (s)

• ttl: Get the activity time of a key

• select(index): Query by index

• move(key, dbindex): Move the key in the current database to the dbindex database

• flushdb: Delete all keys in the currently selected database

• flushall: Delete all keys in all databases

(5) String

• set (key, value): Assign value to the string named key in the database

• get(key): Return the value of the string named key in the database

• getset(key, value): Assign the last value to the string named key

• mget(key1, key2,…, key N): Return to the library The value of multiple strings in

• setnx(key, value): add string, name is key, value is value

• setex(key , time, value): Add string to the library and set the expiration time

• mset(key N, value N): Set the values ​​of multiple strings in batches

• msetnx(key N, value N): If all the strings named key i do not exist

• incr(key): The string named key is incremented 1 operation

• incrby(key, integer): Add integer to the string named key

• decr(key): The string named key Decrement operation by 1

• decrby(key, integer): The string named key is reduced by integer

• append(key, value): The name is The value of the string of key is appended with value

• substr(key, start, end): Returns the substring of the value of the string named key

（6）List

##rpush(key, value): Add an element with value as value at the end of the list named key
lpush(key, value): Add an element whose value is value to the head of the list named key
llen(key): Return the list named key The length of

• ##lrange(key, start, end): Returns the elements between start and end in the list named key

• ltrim (key, start, end): intercept the list named key

• lindex(key, index): return the element at the index position in the list named key

• lset(key, index, value): Assign a value to the element at index position in the list named key

• lrem(key, count, value): Delete count The element whose value is value in the list of keys

• lpop(key): Return and delete the first element in the list named key

• rpop(key): Return and delete the last element in the list named key

• blpop(key1, key2,… key N, timeout): The block version of the lpop command.

• brpop(key1, key2,…key N, timeout): block version of rpop.

• rpoplpush(srckey, dstkey): Return and delete the tail element of the list named srckey, and add the element to the head of the list named dstkey
(7) Set

sadd(key, member): Add element

## to the set named key

• #membersrem(key, member): Delete the element in the set named key

• memberspop(key): Randomly return and delete the element in the set named key an element

• smove(srckey, dstkey, member): Move to the set element

• scard(key): Return the base of the set named key

• sismember(key, member): Whether member is an element of the set named key

• sinter(key1, key2,…key N): Find Intersection

• sinterstore(dstkey, (keys)): Find the intersection and save the intersection to the set of dstkey

• sunion(key1, (keys) )): Find the union

• sunionstore(dstkey, (keys)): Find the union and save the union to the set of dstkey

• sdiff(key1, (keys)): Find the difference set

• sdiffstore(dstkey, (keys)): Find the difference set and save the difference set to the dstkey set

• smembers(key): Returns all elements of the set named key

• ##srandmember(key): Randomly returns an element of the set named key

(8) Hash

• hset(key, field, value): Add to the hash named key Element

• fieldhget(key, field): Returns the value corresponding to the field in the hash named key

• hmget(key, (fields) ): Returns the value corresponding to field i in the hash named key

• hmset(key, (fields)): Adds the element field

  ## to the hash named key

#hincrby(key, field, integer): Increase the value of the field in the hash named key by integer
hexists(key, field): Named key Whether there is a field with the key field in the hash
hdel(key, field): Delete the field with the key field in the hash named key
hlen(key): Returns the number of elements in the hash named key

• ##hkeys(key): Returns all keys in the hash named key

• hvals(key): Returns the values ​​corresponding to all keys in the hash named key

• ##hgetall(key): Returns all keys in the hash named key (field) and its corresponding value

• Summary: The above is the entire content of this article, I hope it will be helpful to everyone.

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