Hash commands

These are the commands that are available for the hash data type.

HSET <key> <field> <value> [field value ...]

Set the value of a field in a hash. Create a hash if it doesn't exist. Replace the value if the field already exists.

Example

> HSET hash field value another_field another_value
ok
 
> HSET hash new_field new_value
ok

HGET <key> <field>

Get the value of a field in a hash. Return nothing if the field doesn't exist.

Example

# Field exists
> HGET hash field
value
 
# Field doesn't exist
> HGET hash doesnt_exist

HGETALL <key>

Get all fields and values in a hash.

Example

> HGETALL hash
field
value
another_field
another_value
new_field
new_value

HDEL <key> <field>

Delete a field in a hash.

Example

> HDEL hash new_field
ok

HLEN <key>

Get the number of fields in a hash.

Example

> HLEN hash
2

HEXISTS <key> <field>

Check if a field exists in a hash.

Example

# Field exists
> HEXISTS hash field
1
 
# Field doesn't exist
> HEXISTS hash doesnt_exist
0

HKEYS <key>

Get all fields in a hash.

Example

> HKEYS hash
field
another_field

HVALS <key>

Get all values in a hash.

Example

> HVALS hash
value
another_value