Redis Hash Veri Yapısı

Giriş

Açıklaması şöyle

Redis Hashes offer built-in functionality for sorting and searching data, making it easy to find specific data points or organize data based on certain criteria.

Redis Hashes offers transaction support, allowing you to perform multiple operations on data in a single transaction, ensuring consistency and reducing the risk of data corruption.

Redis Hashes are highly reliable, with built-in data replication and backup features to ensure that your data is always available and recoverable in the event of a failure.

Redis Hashes offer built-in security features, including support for SSL/TLS encryption and password authentication, making it a secure solution for applications that handle sensitive data.

1. HSET

Açıklaması şöyle

The HSET command sets the value of a field in a hash. If the field does not exist, it creates a new field and sets its value. If the field already exists, it overwrites its value.

Örnek

Şöyle yaparız. This command sets the name of user1 to “John”.      

HSET user1 name "John"

2. HGET

Açıklaması şöyle

The HGET command gets the value of a field in a hash. If the field exists, it returns its value. If the field does not exist, it returns nil.

Örnek

Şöyle yaparız. This command gets the name of user1.

HGET user1 name

3. HMSET

Açıklaması şöyle

The HMSET command sets multiple fields in a hash.

Örnek

Şöyle yaparız. This command sets the name, email, and age of user1.

HMSET user1 name "John" email "john@example.com" age 30

4. HMGET

Açıklaması şöyle

The HMGET command gets the values of multiple fields in a hash.

Örnek

Şöyle yaparız. This command gets the name, email, and age of user1.

HMGET user1 name email age

5. HDEL

Açıklaması şöyle

The HDEL command deletes one or more fields in a hash.

Örnek

Şöyle yaparız. This command deletes the age field of user1.

HDEL user1 age

6. HEXISTS

Açıklaması şöyle

The HEXISTS command checks if a field exists in a hash.

Örnek

Şöyle yaparız. This command checks if the name field exists in user1.

HEXISTS user1 name

7. HKEYS

Açıklaması şöyle

The HKEYS command gets all the keys in a hash.

Örnek

Şöyle yaparız. This command gets all the keys in user1.

HKEYS user1

8. HVALS

Açıklaması şöyle

The HVALS command gets all the values in a hash.

Örnek

Şöyle yaparız. This command gets all the values in user1.

HVALS user1

9. HLEN

Açıklaması şöyle

The HLEN command gets the number of fields in a hash.

Örnek

Şöyle yaparız. This command gets the number of fields in user1.

HLEN user1

10. HINCRBY

Açıklaması şöyle

The HINCRBY command increments the value of a field in a hash by a specified amount.

Örnek

Şöyle yaparız. This command increments the age of the user1 by 5.

HINCRBY user1 age 5

11. HINCRBYFLOAT

Açıklaması şöyle

This command increments the value of a floating-point field in a hash by a specified amount.

Örnek

Şöyle yaparız. This command increments the weight of user1 by 2.5

HINCRBYFLOAT user1 weight 2.5

Örnek

Şöyle yaparız

// create a Redis Hash named “customer1” using the HMSET
HMSET customer1 name "John Doe" email "johndoe@example.com" address "123 Main St"
  phone "555-1234" orders "5"

// use the HGET command to get the name and email of the customer
HGET customer1 name
//Output: “John Doe”

HGET customer1 email
// Output: “johndoe@example.com”

// use the HSET command to update the phone number of the customer
HSET customer1 phone "555-5678"

// use the HINCRBY command to increment the order count for the customer
HINCRBY customer1 orders 1

// se the HMGET command to get the customer’s address and order history
HMGET customer1 address orders
// Output: [“123 Main St”, “6”] 

// use the HDEL command to delete the customer’s phone number
HDEL customer1 phone

// use the HEXISTS command to check if a field exists in the customer1 hash
HEXISTS customer1 email
// Output: 1 (true)

HEXISTS customer1 phone
// Output: 0 (false)