Connect
CLI
RedisInsight
Download RedisInsight to visually explore your Redis data or to engage with raw Redis commands in the workbench.
node-redis
redis-py
NRedisStack
Jedis
NOTE
To setup Redis either locally or in the cloud, refer to the tutorial
Strings/Numbers
CLI
| Command | Syntax | Example | Output |
|---|
| SET | SET key value | | "OK" |
| Description: Set key to hold the string value. If key already holds a value, it is overwritten, regardless of its type.Time Complexity: O(1) | | | |
| GET | GET key | | "Hello" |
| Description: Get the string value of key. If the key does not exist the special value nil is returned.Time Complexity: O(1) | | | |
| MGET | MGET key [key ...] | | 1) "Hello" 2) (nil) |
| Description: 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 is returned.Time Complexity: O(N) | | | |
| INCR | INCR key | | (integer) 1 |
| Description: Increments the number stored at key by one. If the key does not exist, it is set to 0 before performing the operation.Time Complexity: O(1) | | | |
node-redis
redis-py
NRedisStack
Jedis
Generic
CLI
| Command | Syntax | Example | Output |
|---|
| KEYS | KEYS pattern | | 1) "myKey" 2) "myCounter" |
| Description: Returns all keys matching pattern.Time Complexity: O(N) | | | |
| EXISTS | EXISTS key [key ...] | | (integer) 1 |
| Description: Checks if one or more keys exist.Time Complexity: O(N) | | | |
| EXPIRE | EXPIRE key seconds | | (integer) 1 |
| Description: Set a timeout on a key.After the timeout has expired, the key will automatically be deleted.Time Complexity:O(1) | | | |
| TTL | TTL key | | (integer) 113 |
| Description: Returns the remaining time to live of a key that has a timeout.Time Complexity: O(1) | | | |
| PERSIST | PERSIST key | | (integer) 1 |
| Description: Removes the expiration from a key.Time Complexity:O(1) | | | |
| SCAN | SCAN cursor [MATCH pattern] [COUNT count] | | 1) "3" 2) 1) "myCounter" 2) "myKey" |
| Description: Iterates the set of keys in the currently selected Redis database.Time Complexity: O(1) for every call. O(N) for a complete iteration. | | | |
| DEL | DEL key [key ...] | | (integer) 1 |
| Description: Removes the specified keys.Time Complexity: O(N) | | | |
| INFO | INFO [section] | | # Server |
redis_version:6.2.5
redis_git_sha1:00000000
redis_build_id:9893b2a-dirty
redis_mode:standalone
os:Linux 5.4.72-microsoft-standard-WSL2 x86_64
arch_bits:64
...
# Keyspace db0:keys=2,expires=0,avg_ttl=0 |
| Description:Returns information and statistics about the server, with the different sections like - server, clients, memory, persistence, stats, replication, cpu, commandstats, latencystats, sentinel, cluster, modules, keyspace, errorstats.Time Complexity: O(1) |
node-redis
redis-py
NRedisStack
Jedis
Hashes
CLI
| Command | Syntax | Example | Output |
|---|
| HSET | HSET key field value [field value ...] | | (integer) 2 |
| Description: Sets the specified fields to their respective values in the hash stored at key.Time Complexity: O(N) | | | |
| HGET | HGET key field | | "Nicol" |
| Description: Returns the value associated with field in the hash stored at key.Time Complexity: O(1) | | | |
| HGETALL | HGETALL key | | 1) "name" 2) "Nicol" 3) "age" 4) "33" |
| Description: Returns all fields and values of the hash stored at key.Time Complexity: O(N) | | | |
| HMGET | HMGET key field1 [field2] | | 1) "Nicol" 2) "33" |
| Description: Returns the values associated with the specified fields in the hash stored at key.Time Complexity: O(N) | | | |
node-redis
redis-py
NRedisStack
Jedis
Sets
CLI
| Command | Syntax | Example | Output |
|---|
| SADD | SADD key member [member ...] | | (integer) 1 |
| Description: Adds the specified members to the set stored at key. Time Complexity: O(N) | | | |
| SMEMBERS | SMEMBERS key | | 1) "Hello" |
| Description: Returns all the members of the set value stored at key.Time Complexity: O(N) | | | |
| SCARD | SCARD key | | (integer) 1 |
| Description: Returns the set cardinality (number of elements) of the set stored at key.Time Complexity: O(1) | | | |
| SISMEMBER | SISMEMBER key member | | (integer) 1 |
| Description: Returns if member is a member of the set stored at key.Time Complexity: O(1) | | | |
| SDIFF | SDIFF key1 [key2] | | 1) "Hello" |
| Description: Returns the members of the set resulting from the difference between the first set and all the successive sets.Time Complexity: O(N) | | | |
| SDIFFSTORE | SDIFFSTORE destination key1 [key2] | | (integer) 1 |
| Description: This command is equal to SDIFF, but instead of returning the resulting set, it is stored in destination.Time Complexity: O(N) | | | |
| SREM | SREM key member [member ...] | Description: This command is equal to SDIFF, but instead of returning the resulting set, it is stored in destination.Time Complexity: O(N) | (integer) 1 |
| Description: Removes the specified members from the set stored at key. | | | |
node-redis
redis-py
NRedisStack
Jedis
Sorted sets
CLI
| Command | Syntax | Example | Output |
|---|
| ZADD | ZADD key score member [score member ...] | | (integer) 2 |
| Description: Adds all the specified members with the specified scores to the sorted set stored at key. Time Complexity: O(log(N)) | | | |
| ZRANGE | ZRANGE key start stop [WITHSCORES] | | 1) "one" 2)"two" |
| Description: Returns the specified range of elements in the sorted set stored at key.Time Complexity: O(log(N)+M) where M is the number of elements returned | | | |
node-redis
redis-py
NRedisStack
Jedis
Lists
CLI
| Command | Syntax | Example | Output |
|---|
| LPUSH | LPUSH key value [value ...] | | (integer) 1 |
| Description: Inserts the specified values at the head of the list stored at key. Time Complexity: O(N) | | | |
| RPUSH | RPUSH key value [value ...] | | (integer) 2 |
| Description: Inserts the specified values at the tail of the list stored at key.Time Complexity: O(N) | | | |
| LRANGE | LRANGE key start stop | | 1) "World" 2) "Hello" |
| Description: Returns the specified elements of the list stored at key.Time Complexity: O(S+N) where S is the distance of start and N is the number of elements in the specified range. | | | |
| LLEN | LLEN key | | (integer) 2 |
| Description: Returns the length of the list stored at key.Time Complexity: O(1) | | | |
| LPOP | LPOP key [count] | | "World" |
| Description: Removes and returns the first element of the list stored at key.Time Complexity: O(N) | | | |
| RPOP | RPOP key [count] | | "Hello" |
| Description: Removes and returns the last element of the list stored at key.Time Complexity: O(N) | | | |
node-redis
redis-py
NRedisStack
Jedis
Streams
CLI
| Command | Syntax | Example | Output |
|---|
| XADD | XADD key field value [field value ...] | | 1518951480106-0 |
| Description: Appends the specified stream entry to the stream at the specified key. Time Complexity: O(1) when adding a new entry. | | | |
| XREAD | XREAD [COUNT count] [BLOCK milliseconds] STREAMS key [key ...] ID [ID ...] | | 1) 1) "myStream" 2) 1) 1) "1518951480106-0" 2) 1) "sensorId" 2) "1234" 3) "temperature" 4) "19.8" |
| Description: Read data from one or multiple streams, only returning entries with an ID greater than the last received ID reported by the caller. | | | |
| XRANGE | XRANGE key start end [COUNT count] | | 1) 1) 1) "1518951480106-0" 2) 1) "sensorId" 2) "1234" 3) "temperature" 4) "19.8" |
| Description: Returns the entries matching a range of IDs in a stream. Time Complexity: O(N) with N being the number of elements being returned. If N is constant (e.g. always asking for the first 10 elements with COUNT), you can consider it O(1). | | | |
| XLEN | XLEN key | | (integer) 1 |
| Description: Returns the number of entries of a stream. Time Complexity: O(1) | | | |
| XDEL | XDEL key ID [ID ...] | | (integer) 1 |
| Description: Removes the specified entries from a stream. Time Complexity: O(1) for each single item to delete in the stream | | | |
| XTRIM | XTRIM key MAXLEN [~] count | | (integer) 0 |
| Description: Trims the stream to a different length. Time Complexity: O(N), with N being the number of evicted entries. Constant times are very small however, since entries are organized in macro nodes containing multiple entries that can be released with a single deallocation. | | | |
node-redis
redis-py
NRedisStack
Jedis
REDIS STACK COMMANDS
Redis stack extends the core features of Redis OSS like querying across hashes and JSON documents, time series data support, full-text search ..etc
JSON
CLI
| Command | Syntax | Example | Output |
|---|
| JSON.SET | JSON.SET key path value | | OK |
| Description: Sets JSON value at path in key.Time Complexity: O(M+N) where M is the original size and N is the new size | | | |
| JSON.GET | JSON.GET key [path [path ...]] | | |
| Description: Returns the JSON value at path in key.Time Complexity: O(N) when path is evaluated to a single value where N is the size of the value, O(N) when path is evaluated to multiple values, where N is the size of the key | | | |
| JSON.NUMINCRBY | JSON.NUMINCRBY key path number | | 35 |
| Description: Increments a number inside a JSON document.Time Complexity: O(1) when path is evaluated to a single value, O(N) when path is evaluated to multiple values, where N is the size of the key | | | |
| JSON.OBJKEYS | JSON.OBJKEYS key [path] | | 1) "name" 2) "age" |
| Description: Return the keys in the object that's referenced by path. Time Complexity: O(N) when path is evaluated to a single value, where N is the number of keys in the object, O(N) when path is evaluated to multiple values, where N is the size of the key | | | |
| JSON.OBJLEN | JSON.OBJLEN key [path] | | (integer) 2 |
| Description: Report the number of keys in the JSON object at path in key. Time Complexity: O(1) when path is evaluated to a single value, O(N) when path is evaluated to multiple values, where N is the size of the key | | | |
| JSON.ARRAPPEND | JSON.ARRAPPEND key [path] value [value ...] | | (integer) 4 |
| Description: Append the json values into the array at path after the last element in it. Time Complexity: O(1) for each value added, O(N) for multiple values added where N is the size of the key | | | |
| JSON.ARRINSERT | JSON.ARRINSERT key path index value [value ...] | | (integer) 5 |
| Description: Insert the json values into the array at path before the index (shifts to the right). Time Complexity: O(N) when path is evaluated to a single value where N is the size of the array, O(N) when path is evaluated to multiple values, where N is the size of the key | | | |
| JSON.ARRINDEX | JSON.ARRINDEX key path value [start [stop]] | | (integer) 2 |
| Description: Searches for the first occurrence of a JSON value in an array. Time Complexity: O(N) when path is evaluated to a single value where N is the size of the array, O(N) when path is evaluated to multiple values, where N is the size of the key | | | |
node-redis
redis-py
NRedisStack
Jedis
Search and Query
CLI
| Command | Syntax | Example | Output |
|---|
| FT.CREATE | | | OK |
| Description: Create an index with the given specification.Time Complexity: O(K) where K is the number of fields in the document, O(N) for keys in the keySpace | | | |
| FT.SEARCH | | | Matching documents data |
| Description: Search the index with a query, returning either documents or just ids. Time Complexity: O(N) | | | |
| FT.AGGREGATE | LRANGE key start stop | | |
| Description: Run a search query on an index, and perform aggregate transformations on the results. | | | |
| FT.INFO | FT.INFO index | | A list of configuration parameters and stats for the index. |
| Description: Return information and statistics on the index.Time Complexity: O(1) | | | |
| FT.DROPINDEX | FT.DROPINDEX index [DD] | | OK |
| Description: Dropping existing index.Time Complexity:O(1) or O(N) if documents are deleted, where N is the number of keys in the keyspace | | | |
node-redis
redis-py
NRedisStack
Jedis
