Redis commands are the fundamental building blocks for interacting with Redis, an open-source, in-memory data structure store used as a database, cache, and message broker. These commands enable users to perform a wide range of operations on Redis data structures such as strings, hashes, lists, sets, and sorted sets. Here are some key Redis commands and their uses:
Key Redis Commands:
String Commands:
SET key value: Sets the value of a key.GET key: Retrieves the value of a key.INCR key: Increments the integer value of a key by one.
Hash Commands:
HSET key field value: Sets the value of a field in a hash.HGET key field: Retrieves the value of a field in a hash.HGETALL key: Retrieves all fields and values in a hash.
List Commands:
LPUSH key value: Inserts a value at the head of a list.RPUSH key value: Inserts a value at the tail of a list.LPOP key: Removes and returns the first element of a list.LRANGE key start stop: Retrieves a range of elements from a list.
Set Commands:
SADD key member: Adds a member to a set.SMEMBERS key: Retrieves all members of a set.SREM key member: Removes a member from a set.
Sorted Set Commands:
ZADD key score member: Adds a member to a sorted set, or updates its score if it already exists.ZRANGE key start stop [WITHSCORES]: Retrieves a range of members in a sorted set, optionally with scores.ZREM key member: Removes a member from a sorted set.
Key Commands:
DEL key: Deletes a key.EXISTS key: Checks if a key exists.EXPIRE key seconds: Sets a timeout on a key.
Transaction Commands:
MULTI: Marks the start of a transaction block.EXEC: Executes all commands issued after MULTI.DISCARD: Discards all commands issued after MULTI.
Pub/Sub Commands:
PUBLISH channel message: Publishes a message to a channel.SUBSCRIBE channel: Subscribes to a channel to receive messages.
Connection Commands:
PING: Tests if a connection to the server is still alive.AUTH password: Authenticates to the server with a password.