SET key value #: set a key to a value
GET key #: get the value of a key (string only)
DEL key #: delete a key
EXPIRE key seconds #: set a timeout on a key
TTL key #: get the remaining time to live of a key
KEYS pattern #: find all keys matching a pattern
SCAN cursor [MATCH pattern] [COUNT count] [TYPE type] #: iterate over keys with a cursor
String Commands
1
2
3
4
5
6
APPEND key value #: append a value to a key
STRLEN key #: get the length of the value of a key
INCR key #: increment the value of a key by 1
DECR key #: decrement the value of a key by 1
INCRBY key increment #: increment the value of a key by a specified amount
DECRBY key decrement #: decrement the value of a key by a specified amount
Hash Commands
1
2
3
4
5
6
7
8
HSET key field value #: set a field in a hash to a value
HGET key field #: get the value of a field in a hash
HDEL key field [field …] #: delete one or more fields from a hash
HGETALL key #: get all fields and values from a hash
HKEYS key #: get all fields from a hash
HVALS key #: get all values from a hash
HEXISTS key field #: check if a field exists in a hash
HLEN key #: get the number of fields in a hash
# Initialize the hash
HMSET user name "John Doe" age 30 email "lushuan2071@126.com"
# Get the value of a field
HGET user name # Output: "John Doe"
# Get the values of multiple fields
HMGET user name age # Output: 1) "John Doe" 2) "30"
# Get all fields and values
HGETALL user # Output: 1) "name" 2) "John Doe" 3) "age" 4) "30" 5) "email" 6) "johndoe@example.com"
# Get all fields
HKEYS user # Output: 1) "name" 2) "age" 3) "email"
# Get all values
HVALS user # Output: 1) "John Doe" 2) "30" 3) "johndoe@example.com"
# Get the number of fields
HLEN user # Output: 3
# Modify a field
HSET user age 31
HGET user age # Output: "31"
# Increment a field
HINCRBY user age 1
HGET user age # Output: "32"
# Delete a field
HDEL user email
HKEYS user # Output: 1) "name" 2) "age"
List Commands
1
2
3
4
5
6
7
8
LPUSH key value [value …] #: prepend one or more values to a list
RPUSH key value [value …] #: append one or more values to a list
LPOP key #: remove and return the first element of a list
RPOP key #: remove and return the last element of a list
LINDEX key index #: get the element at a specified index in a list
LLEN key #: get the length of a list
LRANGE key start stop #: get a range of elements from a list
LREM key count value #: remove a specified number of occurrences of a value from a list
# Initialize the list
LPUSH numbers 3 2 1
# Get the length of the list
LLEN numbers # Output: 3
# Get an element by index
LINDEX numbers 1 # Output: "2"
# Get a range of elements
LRANGE numbers 0 1 # Output: 1) "1" 2) "2"
# Append an element
RPUSH numbers 4
LRANGE numbers 0 -1 # Output: 1) "1" 2) "2" 3) "3" 4) "4"
# Pop an element
LPOP numbers # Output: "1"
RPOP numbers # Output: "4"
LRANGE numbers 0 -1 # Output: 1) "2" 2) "3"
# Insert an element
LINSERT numbers BEFORE 2 1
LRANGE numbers 0 -1 # Output: 1) "1" 2) "2" 3) "3"
# Remove an element
LREM numbers 1 2
LRANGE numbers 0 -1 # Output: 1) "1" 2) "3"
# Trim the list
LTRIM numbers 0 0
LRANGE numbers 0 -1 # Output: 1) "1"
Set Commands
1
2
3
4
5
6
SADD key member [member …] #: add one or more members to a set
SREM key member [member …] #: remove one or more members from a set
SMEMBERS key #: get all members of a set
SISMEMBER key member #: check if a member exists in a set
SINTER key [key …] #: get the intersection of sets
SUNION key [key …] #: get the union of sets
# Initialize the set
SADD fruits apple banana orange
# Get the number of elements in the set
SCARD fruits # Output: 3
# Check if an element is a member of the set
SISMEMBER fruits apple # Output: 1 (true)
# Get all members of the set
SMEMBERS fruits # Output: 1) "apple" 2) "banana" 3) "orange"
# Remove an element from the set
SREM fruits banana
SMEMBERS fruits # Output: 1) "apple" 2) "orange"
# Add multiple elements to the set
SADD fruits pear peach
SMEMBERS fruits # Output: 1) "apple" 2) "orange" 3) "pear" 4) "peach"
# Get the intersection of multiple sets
SADD fruits2 orange kiwi
SINTER fruits fruits2 # Output: 1) "orange"
# Get the union of multiple sets
SUNION fruits fruits2 # Output: 1) "apple" 2) "orange" 3) "pear" 4) "peach" 5) "kiwi"
# Get a random element from the set
SRANDMEMBER fruits # Output: "pear"
Sorted Set Commands
1
2
3
4
5
ZADD key score member [score member …] #: add one or more members with scores to a sorted set
ZREM key member [member …] #: remove one or more members from a sorted set
ZRANGE key start stop [WITHSCORES] #: The order of elements is from the lowest to the highest score. Elements with the same score are ordered lexicographically.
ZREVRANGE key start stop [WITHSCORES] #: Returns the specified range of elements in the sorted set stored at key. The elements are considered to be ordered from the highest to the lowest score.
ZSCORE key member #: get the score of a member in a sorted set
# Initialize the sorted set
ZADD scores 90 "Alice" 85 "Bob" 95 "Charlie"
# Get the number of elements in the sorted set
ZCARD scores # Output: 3
# Get the rank of an element
ZRANK scores "Charlie" # Output: 2
# Get the score of an element
ZSCORE scores "Bob" # Output: 85
# Get a range of elements by rank
ZRANGE scores 0 1 # Output: 1) "Bob" 2) "Alice"
# Get a range of elements by score
ZRANGEBYSCORE scores 90 95 # Output: 1) "Alice" 2) "Charlie"
# Increment the score of an element
ZINCRBY scores 10 "Alice"
ZSCORE scores "Alice" # Output: 100
# Remove an element from the sorted set
ZREM scores "Bob"
ZRANGE scores 0 -1 # Output: 1) "Charlie" 2) "Alice"
# Get the highest-scoring element(s)
ZREVRANGE scores 0 0 # Output: 1) "Alice"
# String
SET key value
SET name "John Doe"
# List
RPUSH key element [element ...]
RPUSH numbers 1 2 3 4 5
# Set
SADD key member [member ...]
SADD colors red green blue
# Hash
HSET key field value [field value ...]
HSET user id 1 name "John Doe" email "john.doe@example.com"
# Sorted set
ZADD key score member [score member ...]
ZADD scores 90 "John Doe" 80 "Jane Doe" 95 "Bob Smith"
127.0.0.1:6379> MULTI
OK
127.0.0.1:6379(TX)> SET key1 1
QUEUED
127.0.0.1:6379(TX)> SET key2 2
QUEUED
127.0.0.1:6379(TX)> EXEC
OK
OK
127.0.0.1:6379> GET key1
1
Less is more
