Hash Commands

Hash commands allow you to store key-value pairs as hash tables (also known as maps or dictionaries). Each hash can store up to 2^32 - 1 field-value pairs.

Command List

HDEL

Deletes one or more specified fields from a hash table

HEXISTS

Checks if a specified field exists in a hash table

HGET

Gets the value of a specified field stored in a hash table

HGETALL

Gets all fields and values in a hash table

HSCAN

Incrementally iterates over the fields and values of a hash

HKEYS

Gets all field names in a hash table

HLEN

Gets the number of fields in a hash table

HMGET

Gets the values of all given fields

HMSET

Sets multiple field-value pairs to a hash table simultaneously

HSET

Sets a field-value pair to a hash table

HSETNX

Sets the value of a field in a hash table only if the field does not exist

HSTRLEN

Returns the string length of the value of a specified field in a hash table

HVALS

Returns all values in a hash table

HINCRBY

Increments the integer value of a hash field by the given number

HINCRBYFLOAT

Increments the float value of a hash field by the given amount

Use Cases

Hash commands are ideal for representing objects, such as user profiles, product information, etc. You can store all properties of an object in a single hash, with each property as a field.

For detailed usage and parameters of each command, please refer to the individual command documentation linked above.