Redis Common Commands Quick Check < second >

First, Key

Key command Quick check:

Command	Description
Del	Delete the given one or more keys, the nonexistent key will be ignored, the return value: the number of deleted keys
DUMP	Serializes the given key, returns the serialized value, and uses the RESTORE command to deserialize the value into the Redis key
EXISTS	Checks if a given key exists
EXPIRE	Set a valid time for a given key, accept a point in time
Expireat	Set the effective time for the given key, and accept the timestamp timestamp
KEYS	Find all keys that match the pattern of the given patterns ;KEYS * matches all Key;keys H?llo matching Hello,hallo in the database. KEYS H[ae]llo matches Hello and Hallo
MIGRATE	The key is atomically transferred from the current instance to the specified database of the target instance, and once the transfer succeeds, the key is guaranteed to appear on the target instance, and the key on the current instance is deleted. Two instances of migration are blocked during execution
MOVE	Moves the key of the current database to the given DB
OBJECT	View the Redis object for a given key from the inside
PERSIST	Remove the valid time for a given key
Pexpire	Set the effective time of key in milliseconds
Pexpireat	Set the effective time (timespan) of a key in milliseconds
Pttl	Returns the remaining valid time of key in milliseconds
Randomkey	A key that is randomly returned (used) from the current database
RENAME	Renaming a key
Renamenx	Rename key to Newkey when and only if Newkey does not exist
RESTORE	Deserializes the given serialized value and associates it with the given key
SORT	Returns or saves a sorted element in a given list, collection, and ordered collection key
Ttl	Returns the remaining valid time for a given key , in seconds
TYPE	Returns the type of value stored by key
SCAN	Incremental iterations

Second, String

String Command Quick check:

Command	Description
APPEND	Appends the value to the end of the value of the specified key and, if the key does not exist, increases the operation.
Bitcount	Calculates the number of bit bits that are set to 1 in the given string.
Bitop	Bitwise operation on one or more string keys that hold bits
Decr	Subtract one of the numeric values stored in the key . Key does not exist, the value of the 0,key type incorrectly returns an error.
Decrby	Subtracts the value stored by the key by the specified number
GET	Returns the string value associated with key, or returns an error if the value stored by Key is not a string type.
Getbit	Gets the bit on the specified offset for the string value stored by the key
GETRANGE	Returns a substring of the string value in key, with the intercept range of the string determined by the start and end two offsets
Getset	Sets the value of the given key to value and returns the old value of key. Non-string error.
INCR	Increase the numeric value stored in key by one. Failure to convert to a number is an error.
Incrby	Adds the value stored by key to the specified increment
Incrbyfloat	Adds the specified floating-point increment to the value stored in key
MGET	Returns the value of all (one or more) given key
MSET	Set one or more key-value pairs at the same time
Msetnx	Set one or more key-value pairs at the same time, if a key is already occupied, then all execution is canceled.
Psetex	Set the effective time of key in milliseconds
SET	Associating a string value to a key
Setbit	Sets or clears a bit (bit) on the specified offset for the string value stored by key
Setex	Associates a value in a key with the key's effective time (in seconds)
Setnx	Set to the specified value when key is not being used
SETRANGE	Overwrite (overwrite) the string value stored by the given key with the value parameter, starting with offset offsets
STRLEN	Returns the length of the string value stored by key

Third, Hash

Hash command Quick check:

Command	Description
Hdel	Deletes one or more specified domains in the hash table key, and the nonexistent fields are ignored.
Hexists	View Hash table key, whether a given domain field exists
Hget	Returns the value of the given field field in the hash table key
Hgetall	Returns the hash table key, all fields and values
Hincrby	Adds the specified increment to the value of the field field in the hash table key
Hincrbyfloat	Adds the specified floating-point increment to the Field field in the hash table key
Hkeys	Returns all the fields in the hash table key
Hlen	Returns the number of fields in the hash table key
Hmget	Returns the value of one or more given fields in a hash table key
Hmset	Set multiple Field-value (domain-value) pairs to the hash table key at the same time
Hset	Set the value of the field field in hash table key to value
Hsetnx	When and only if the domain field does not exist, set the value of the field field in the hash table key to value
Hvals	Returns the value of all fields in the hash table key
HSCAN	Incremental iterations

Iv. List

List command Quick check:

Command	Description
Blpop	It is a blocked version of the Lpop command, and the connection will be blocked by the Blpop command until the wait time-out or a popup element is found when no elements in the given list are available to eject
Brpop	Synonymous with Blpop, different pop-up positions
Brpoplpush	When the list source is empty, the Brpoplpush command blocks the connection until the wait time-out
LINDEX	Returns the element in the list key, subscript index
Linsert	Insert value values into List key
Llen	Returns the length of the list key
Lpop	Remove and return the header element of the list key
Lpush	Inserts one or more value values into the table header of the list key
Lpushx	Insert value values into the table header of the list key , when and only if key exists and is a list
Lrange	Returns the element in the specified interval in the list key , with the interval specified by the offset start and stop
Lrem	Removes the element in the list that is equal to the parameter value , based on the value of the parameter count
LSET	Set the value of the element with the list key subscript as index to value
LTRIM	Trim (trim) a list so that the list retains only the elements within the specified interval, and the elements that are not within the specified range are deleted
Rpop	Remove and return the tail element of the list key
Rpoplpush	Command Rpoplpush performs two actions in an atomic time: 1, pops the last element in the list source (the trailing element), and returns it to the client. 2. Insert the source popup element into the list destination, as the head element of the destination list.
Rpush	Inserts one or more value values into the footer of the list key
Rpushx	Inserts a value of values into the footer of the list key when and only if key exists and is a list

Five, Set

Set command Quick check

Command	Description
Sadd	Adding one or more member elements to the collection key, member elements that already exist in the collection will be ignored
SCard	Returns the number of elements in the collection of the collection key
Sdiff	Returns all members of a collection, which is a set of differences between all given sets
Sdiffstore	This command works similarly to Sdiff, but it saves the result to a new collection instead of simply returning the result set
SINTER	Returns all members of a collection that are the intersection of all given collections
Sinterstore	Similar to sinter, but can be specified to be saved to a new collection
Sismember	Determines whether the member element is a member of the collection key
Smembers	Returns all members in the collection key
Smove	Move member elements from one collection to another
SPOP	Removes and returns a random element in the collection
Srandmember	Simply return random elements without any changes to the collection, unlike Spop, which does not remove
Srem	Removes one or more member elements from the collection key, and the nonexistent member element is ignored
Sunion	Returns all members of a collection, which is the set of all the given collections
Sunionstore	Similar to sunion, but can be specified to be saved to a new collection
Sscan	Incremental iterations

Liu, SortedSet

SortedSet Command Quick check:

Command	Description
Zadd	Adds one or more member elements and their score values to the ordered set key
Zcard	Returns the cardinality of an ordered set key
Zcount	Returns the number of members in an ordered set key that score values between Min and Max (including the score value equals min or max)
Zincrby	The score value of the member member for the ordered set key plus the specified increment
Zrange	Returns the member within the specified range (small to large) in the ordered set key
Zrangebyscore	Returns a member of the ordered set key, all score values between Min and Max (including equals min or Max)
Zrank	Returns the rank of the member member in the ordered set key. Where ordered set members are ascending (from small to large) in order of score values
Zrem	Remove one or more members from an ordered set key , the nonexistent member will be ignored
Zremrangebyrank	Removes an ordered set key , specifying all members within the rank (rank) range
Zremrangebyscore	Remove ordered set key , all score values between min and Max , including members equal to min or max
Zrevrange	Returns the ordered set key , the member within the specified interval, and the position of the member in the score large to small arrangement
Zrevrangebyscore	Returns the ordered set key, where the score value is between Max and Min (the default includes all members equal to Max or min). The members are arranged in descending order of score values (from large to small)
Zrevrank	Returns the rank of the member member in the ordered set key. Where ordered set members are sorted by score value descending (from large to small)
Zscore	Returns the score value of the member member in the ordered set key
Zunionstore	Computes the set of a given one or more ordered sets, where the number of a given key must be specified with the Numkeys parameter and the set (result set) is stored in the new collection
Zinterstore	Computes the intersection of one or more ordered sets given, where the number of a given key must be specified with the Numkeys parameter and the intersection (result set) is stored in the new collection
Zscan	Incremental iterations

Seven, Pub/sub

Pub/sub Command Quick check:

Command	Description
Psubscribe	Subscribe to one or more channels that match a given pattern
PUBLISH	Send Message message to the specified channel
PUBSUB	PUBSUB is an introspective command to view the status of a subscription and a publishing system
Punsubscribe	Instructs the client to unsubscribe from all given patterns
SUBSCRIBE	Subscribe to information for one or more channels given
Unsubscribe	Instructs the client to unsubscribe from a given channel

Eight, Transaction

Transaction Command Quick check:

Command	Description
DISCARD	Cancels the transaction and discards all commands within the transaction block
Exec	Execute commands within all transaction blocks
MULTI	Mark the beginning of a transaction block
Unwatch	Suppress watch command for all key monitoring
WATCH	Monitor one (or more) key if this (or these) key is changed by another command before the transaction is executed, then the transaction will be interrupted

Ninth, Script

Script Command Quick check:

Command	Description
Eval	With the built-in LUA interpreter, you can use the EVAL command to evaluate Lua scripts
Evalsha	Evaluates the script cached in the server based on the given SHA1 checksum code
SCRIPT EXISTS	Given the SHA1 checksum of one or more scripts, returns a list of 0 and 1 indicating whether the checksum specified script has been saved in the cache
SCRIPT FLUSH	Clear all Lua script caches
SCRIPT KILL	Stops the currently running Lua script, which takes effect only if the script has not performed any write operations. This command is used primarily to terminate scripts that are running too long
SCRIPT LOAD	Adds script scripts to the script cache, but does not immediately execute the script

Ten, Connection

Connection Command Quick check:

Command	Description
AUTH	By setting the value of the requirepass entry in the configuration file, you can use a password to protect the Redis server
ECHO	Prints a specific message that is used when testing.
Ping	Use the client to send a PING to the Redis server, which returns a PONG if the server is functioning normally, to test whether the connection to the server is still in effect, or to measure the delay value
QUIT	Requests the server to close the connection to the current client
SELECT	Switches to the specified database, the database index number is specified with a numeric value, and 0 is the starting index value

Xi. Server

Server Command Quick check:

Command	Description
Bgrewriteaof	Performs a aof file rewrite operation. Overrides create a volume-optimized version of the current AOF file.
BGSAVE	Asynchronously (asynchronously) saves data from the current database to disk in the background
CLIENT GETNAME	Returns the name of the CLIENT SETNAME command for the connection setting
CLIENT KILL	To close a client with an address of ip:port
CLIENT LIST	Returns all client information and statistics connected to the server in a human-readable format
CLIENT SETNAME	Assigns a name to the current connection
CONFIG GET	The config get command is used to obtain configuration parameters for a running Redis server
CONFIG Resetstat	Reset some statistics in the INFO command
CONFIG REWRITE	CONFIG REWRITE command to overwrite the redis.conf file specified when starting the Redis server
CONFIG SET	The Config SET command dynamically adjusts the configuration of the Redis server without having to reboot
Dbsize	Returns the number of keys for the current database
DEBUG OBJECT	Debug OBJECT is a debug command that should not be used by the client
DEBUG Segfault	Perform an illegal memory access so that Redis crashes and is only used for BUG simulations at development time
Flushall	Clears data for the entire Redis server (removes all keys from all databases)
Flushdb	Empties all keys in the current database
INFO	Returns various information and statistics about the Redis server
Lastsave	Returns the time that the most recent Redis successfully saved data to disk, expressed in UNIX timestamp format
MONITOR	Print out the commands received by the Redis server in real time, and try
PSYNC	Internal commands for the replication feature
SAVE	The Save command performs a synchronous save operation that saves all data snapshots (snapshot) of the current Redis instance to the hard disk as an RDB file. In general, the save operation is rarely performed in a production environment because it blocks all clients, and the task of saving the database is typically performed asynchronously by the BGSAVE command. However, save can be used as the last resort to save data if the background child process that is responsible for saving the data unfortunately has a problem.
SHUTDOWN	The SHUTDOWN command performs the following actions: Stop all Clients If there is at least one save point waiting, execute the Save command If the AOF option is open, update the AOF file Turn off Redis server (server)
Slaveof	The slaveof command is used to dynamically modify the behavior of the Replication (replication) feature at the Redis runtime
Slowlog	Slow log is a journaling system used by Redis to record query execution times
SYNC	Internal commands for the replication feature
Time	Returns the current server time

Redis Common Commands Quick Check < second >