BITCOUNT key [start end] Count the number of set bits (population counting) in a string.

MSETNX key value [key value ...] Sets the given keys to their respective values, only if all keys don't exist. MSETNX is atomic, so either all keys a

SETBIT key offset value Sets or clears the bit at offset in the string value stored at key.

APPEND key value

EXPIREAT key timestamp EXPIREAT has the same effect and semantic as EXPIRE, but instead of specifying the number of seconds representing the TTL (tim

RANDOMKEY Return a random key from the currently selected database. # Returns Bulk string reply: the random key, or nil when the database is empty

SETEX key seconds value

ZADD key score member [score member ...]

MSET key value [key value ...] Sets the given keys to their respective values. MSET replaces existing values with new values, just like regular SET.

PTTL key Like TTL this command returns the remaining time to live of a key that has an expire set, with the sole difference that TTL returns the amou

SETRANGE key offset value

SETNX key value Set key to hold string value if key does not exist. When key already holds a value, no operation is performed. # Time Complexity O(1

GETSET key value Atomically sets key to value and returns the old value stored at key. Returns an error when key exists but does not hold a string va

ZINCRBY key increment member

TTL key Returns the remaining time to live of a key that has a timeout. This introspection capability allows a Redis client to check how many seconds

ZSCORE key member

PEXPIRE key milliseconds This command works exactly like EXPIRE but the time to live of the key is specified in milliseconds instead of seconds. # R

MGET key [key ...] Returns the values of all specified keys. For every key that does not hold a string value or does not exist, the special value nil

STRLEN key

FLUSHALL Delete all the keys of all the existing databases, not just the currently selected one. This command never fails. # Returns Simple string r

EXPIRE key seconds Set a timeout on key. After the timeout has expired, the key will automatically be deleted. A key with an associated timeout is of

KEYS pattern Returns all keys matching pattern. Warning: This command should only be used in production environments with extreme care. It may ruin p

PEXPIREAT key milliseconds-timestamp PEXPIREAT has the same effect and semantic as EXPIREAT, but the Unix time at which the key will expire is specif

TYPE key Returns the string representation of the type of the value stored at key. The different types that can be returned are: string, list, set, z

PSETEX key milliseconds value Set key to hold string value and set key to timeout after a given number of milliseconds. This command is atomic. It is

FLUSHDB Delete all the keys of the currently selected DB. This command never fails. # Returns Simple string reply: OK

PERSIST key Remove the existing timeout on key, turning the key from volatile (a key with an expire set) to persistent (a key that will never expire

GETBIT key offset Returns the bit value at offset in the string value stored at key.