Redis command organization and usage

This article mainly introduces the relevant information about Redis commands and explains how to use them. Friends who need it can refer to it. I hope it can help everyone.

Commands related to connection operations

• quit: close the connection (connection)

• auth: Simple password authentication

Persistence

• save: Synchronously save data to disk

• bgsave: Asynchronously save data to disk

• lastsave: Return the Unix timestamp of the last successful data save to disk

• shundown: Synchronously save the data to disk and then close the service

Remote service control

• info: Provided Server information and statistics

• monitor: Live dump of received requests

• slaveof: Change replication policy settings

• config: Configure the Redis server at runtime

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 space

• keyrename(oldname, newname): Rename key

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

• expire: Set the activity time of a key (s)

• ttl: Get the activity time of a key

• select(index): Press Index query

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

• flushdb: Delete the key in the currently selected database All keys

• flushall: Delete all keys in all databases

##Commands for String operations

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

##get(key): Return the string named key in the database The value of string
getset(key, value): Assign the last value to the string named key
mget(key1, key2 ,…, key N): Returns the value of multiple strings in the library
setnx(key, value): Adds a string with the name key and value value
setex(key, time, value): Add string to the library and set the expiration time
mset(key N, value N): Set multiple batches The value of a string
msetnx(key N, value N): If all strings named key i do not exist
incr( key): The string named key is incremented by 1 operation
incrby(key, integer): The string named key is incremented by integer
decr (key): Decrement the string named key by 1.
decrby(key, integer): Decrease the string named key by integer
append(key, value): append the value of the string named key
substr(key, start, end): return the substring of the value of the string named key

Commands for List operations

rpush(key, value): Add a value to the end of the list named key The element of value
lpush(key, value): Add an element of value to the head of the list named key

• ##llen (key): Returns the length of the list named key

• ##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 list named key Element at index position

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

##lrem (key, count, value): Delete the element whose value is value in the list of count 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): block version of 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
• Commands for Set operations

sadd(key, member): Add element member to the set named key

srem(key, member): Delete the element member in the set named key
spop(key): Randomly return and delete the element named key An element in the set
smove(srckey, dstkey, member): Move to the set element
scard(key): The return name is The cardinality of the set of key
sismember(key, member): whether member is an element of the set named key
sinter(key1, key2,...key N): Find the 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 collection of dstkey

10. sdiff(key1, (keys)): Find the difference set

11. sdiffstore(dstkey, (keys)): Find the difference set and save it To the set of dstkey

12. smembers(key): Returns all elements of the set with the name key

13. srandmember(key): Returns the name randomly It is an element of the set of key

Command for Hash operation

1. hset(key, field, value) : Add element field

2. hget(key, field) to the hash named key

3. ##hget(key, field): Return the value corresponding to the field in the hash named key

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

##hmset(key, (fields)): Returns the value corresponding to field i in the hash named key Add the element field
hincrby(key, field, integer) to the hash: Increase the value of the field in the hash named key by integer
hexists(key, field): Whether there is a field with the key field in the hash named key
hdel(key, field): Delete the field with the key field in the hash named key Domain
hlen(key): Returns the number of elements in the hash named key
hkeys(key): Returns the number of elements named key All keys in the hash
hvals(key): Returns the values ​​corresponding to all keys in the hash named key
hgetall(key): Returns all the keys (fields) in the hash named key and their corresponding values

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