Redis

Hashes Commands

Store objects as field-value pairs with Redis hashes. Learn HSET, HGET, and hash operations for efficient object storage without serialization overhead.

8 commands

Pro Tips

Use HMSET/HMGET to set/get multiple fields in one call - reduces round trips.

HINCRBY lets you atomically increment numeric hash fields - great for per-user counters.

HSCAN iterates over large hashes without blocking - use instead of HGETALL for big hashes.

Common Mistakes

HGETALL on large hashes blocks Redis. Use HSCAN for hashes with many fields.

Commands

Delete hash field

$ HDEL key field

Delete field from hash

Check field exists

$ HEXISTS key field

Check if field exists in hash

Get hash field

$ HGET key field

Get value of hash field

Get all hash fields

$ HGETALL key

Get all fields and values in hash

Increment hash field

$ HINCRBY key field increment

Increment hash field by integer

Get multiple hash fields

$ HMGET key field1 field2

Get values of multiple hash fields

Set multiple hash fields

$ HMSET key field1 value1 field2 value2

Set multiple fields in hash

Set hash field

$ HSET key field value

Set field in hash