191

Redis Hashes

Redis Hashes are the perfect data type to represent objects. They used to map between the string fields and the string values. In Redis, every hash can store up to more than 4 billion field-value pairs.

Example

redis 127.0.0.1:6379> HMSET tutoraspire name “A solution to all Technology” description “India’s fastest growing tutorial website” daily 1 million visitors 10 millions page visit.

In the above example, “tutoraspire” is Redis hash which contains the details (name, description, 1, million, 10, vistiors, page, visit) etc.

---

Redis Hash Commands

Index	Command	Description
1	HDEL key field2 [field2]	It is used to delete one or more hash fields.
2	HEXISTS key field	It is used to determine whether a hash field exists or not.
3	HGET key field	It is used to get the value of a hash field stored at the specified key.
4	HGETALL key	It is used to get all the fields and values stored in a hash at the specified key
5	HINCRBY key field increment	It is used to increment the integer value of a hash field by the given number
6	HINCRBYFLOAT key field increment	It is used to increment the float value of a hash field by the given amount
7	HKEYS key	It is used to get all the fields in a hash
8	HLEN key	It is used to get the number of fields in a hash
9	HMGET key field1 [field2]	It is used to get the values of all the given hash fields
10	HMSET key field1 value1 [field2 value2 ]	It is used to set multiple hash fields to multiple values
11	HSET key field value	It is used to set the string value of a hash field
12	HSETNX key field value	It is used to set the value of a hash field, only if the field does not exist
13	HVALS key	It is used to get all the values in a hash