Redis Basic Commands

Strings

Basic Operations

• SET key value: Sets the value of a key.

  SET mykey "Hello"

• GET key: Gets the value of a key.

  GET mykey

• SETNX key value: Sets the value of a key if it does not exist.

  SETNX mykey "World"

• MGET key1 key2 ... keyN: Gets the values of multiple keys.

  MGET key1 key2 key3

• MSET key1 value1 key2 value2 ... keyN valueN: Sets the values of multiple keys.

  MSET key1 "value1" key2 "value2" key3 "value3"

Number Operations

• INCR key: Increments the value of a key by 1.

  INCR mycounter

• INCRBY key increment: Increments the value of a key by a specified increment.

  INCRBY mycounter 5

Bitwise Operations

• GETBIT key offset: Returns the bit value at the specified offset.

  GETBIT mykey 7

• SETBIT key offset value: Sets or clears the bit at the specified offset.

  SETBIT mykey 7 1

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

  BITCOUNT mykey 0 7

Performance

• SUBSTR key start end: Returns the substring of the string stored at a key.

  SUBSTR mykey 0 4

• GETRANGE key start end: Returns the substring of the string stored at a key (alias of SUBSTR).

  GETRANGE mykey 0 4

• SETRANGE key offset value: Overwrites part of the string stored at a key starting at the specified offset.

  SETRANGE mykey 6 "Redis"

Lists

Stack Operations

• LPUSH key value1 [value2]: Inserts values at the head of the list.

  LPUSH mylist "world"
  LPUSH mylist "hello"

• RPUSH key value1 [value2]: Inserts values at the tail of the list.

  RPUSH mylist "hello"
  RPUSH mylist "world"

Queue Operations

• LPOP key: Removes and returns the first element of the list.

  LPOP mylist

• RPOP key: Removes and returns the last element of the list.

  RPOP mylist

Blocking Commands

• BLPOP key [key2 ...] timeout: Removes and returns the first element of the list, or blocks until one is available.

  BLPOP mylist 0

• BRPOP key [key2 ...] timeout: Removes and returns the last element of the list, or blocks until one is available.

  BRPOP mylist 0

• LRANGE key start stop: Returns a range of elements from the list.

  LRANGE mylist 0 -1

Miscellaneous

• DEL key: Deletes a key.

  DEL mykey

KEYS user:*

```sh KEYS user:* ```

Redis Sets

• SADD key member1 [member2]: Adds members to a set.

  SADD myset "Hello"

• SREM key member1 [member2]: Removes members from a set.

  SREM myset "Hello"

• SISMEMBER key member: Checks if a member exists in a set.

  SISMEMBER myset "Hello"

• SMEMBERS key: Returns all members of a set.

  SMEMBERS myset

• SCARD key: Gets the number of members in a set.

  SCARD myset

Redis Hashes

• HSET key field value: Sets the value of a field in a hash.

  HSET myhash field1 "Hello"

• HGET key field: Gets the value of a field in a hash.

  HGET myhash field1

• HMGET key field1 [field2]: Gets the values of multiple fields in a hash.

  HMGET myhash field1 field2

• HINCRBY key field increment: Increments the value of a field in a hash by a specified increment.

  HINCRBY myhash field1 5

Redis Sorted Sets

• ZADD key score member [score member ...]: Adds members to a sorted set, or updates the score if it already exists.

  ZADD myzset 1 "one"

• ZRANGE key start stop [WITHSCORES]: Returns a range of members in a sorted set, by index.

  ZRANGE myzset 0 -1

• ZREVRANGE key start stop [WITHSCORES]: Returns a range of members in a sorted set, by index, with scores ordered from high to low.

  ZREVRANGE myzset 0 -1

Redis Streams

• XADD key * field value [field value ...]: Appends a new entry to a stream.

  XADD mystream * field1 "value1"

• XREAD COUNT count STREAMS key [key ...] ID [ID ...]: Reads data from one or multiple streams.

  XREAD COUNT 2 STREAMS mystream 0

• XRANGE key start end [COUNT count]: Returns a range of entries from a stream.

  XRANGE mystream - +

• XLEN key: Gets the length of a stream.

  XLEN mystream

Redis Geospatial

• GEOADD key longitude latitude member [longitude latitude member ...]: Adds geospatial items (latitude, longitude, name) to a key.

  GEOADD mygeoset 13.361389 38.115556 "Palermo"

• GEORADIUS key longitude latitude radius unit: Queries a sorted set representing a geospatial index to fetch members matching a given maximum distance from a point.

  GEORADIUS mygeoset 15 37 200 km

Additional Commonly Used Commands

Keys

• EXISTS key: Checks if a key exists.

  EXISTS mykey

• EXPIRE key seconds: Sets a timeout on a key.

  EXPIRE mykey 10

• TTL key: Gets the time to live for a key.

  TTL mykey

Transactions

• MULTI: Marks the start of a transaction block.

  MULTI

• EXEC: Executes all commands issued after MULTI.

  EXEC

• DISCARD: Discards all commands issued after MULTI.

  DISCARD

Pub/Sub

• PUBLISH channel message: Posts a message to a channel.

  PUBLISH mychannel "Hello, Redis!"

• SUBSCRIBE channel [channel ...]: Subscribes to a channel.

  SUBSCRIBE mychannel

• UNSUBSCRIBE [channel ...]: Unsubscribes from a channel.

  UNSUBSCRIBE mychannel