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 |
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