Introduction to Redis

Cursusinhoud

Introduction to Redis

Introduction to Redis

1. Redis Fundamentals

What is Redis?Uses of Redis Installing Redis on Windows Installing Redis on MacOS Connecting to and Starting Redis

2. The Essential Redis Commands

SET Command GET Command EXISTS Command Challenge: Basic Commands INCR and DECR Commands Challenge: INCR and DECR Data Deletion

3. Data Types in Redis

String List Challenge: Task Management System Set Challenge: Managing User Interests Sorted Set Hash Table Challenge: Managing User Profiles

4. Advanced Features and Security

Managing Key Expiration Transactions PubSub Security RDB Persistence AOF Persistence

5. Caching with Redis and Spring Boot

Introduction to Caching Integration with Spring Boot Annotations for Working with Cache Practical Use of Hashes

EXISTS Command

EXISTS Command

If you simply need to check whether a key exists in Redis without retrieving its value, you can use the EXISTS command.

Example Usage

If you provide a single key, the result will be 1 if the key exists, or 0 if it does not.

In this case, the result will be 1 since the key mykey exists.

When multiple keys are specified, the command will return the number of keys that exist in Redis. If we also have keys key1 and key3 in the database, this query will return 2, since only key1 and key3 exist in the database.

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Sectie 2. Hoofdstuk 3

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Cursusinhoud

Introduction to Redis

Introduction to Redis

1. Redis Fundamentals

What is Redis?Uses of Redis Installing Redis on Windows Installing Redis on MacOS Connecting to and Starting Redis

2. The Essential Redis Commands

SET Command GET Command EXISTS Command Challenge: Basic Commands INCR and DECR Commands Challenge: INCR and DECR Data Deletion

3. Data Types in Redis

String List Challenge: Task Management System Set Challenge: Managing User Interests Sorted Set Hash Table Challenge: Managing User Profiles

4. Advanced Features and Security

Managing Key Expiration Transactions PubSub Security RDB Persistence AOF Persistence

5. Caching with Redis and Spring Boot

Introduction to Caching Integration with Spring Boot Annotations for Working with Cache Practical Use of Hashes

EXISTS Command

EXISTS Command

If you simply need to check whether a key exists in Redis without retrieving its value, you can use the EXISTS command.

Example Usage

If you provide a single key, the result will be 1 if the key exists, or 0 if it does not.

In this case, the result will be 1 since the key mykey exists.

When multiple keys are specified, the command will return the number of keys that exist in Redis. If we also have keys key1 and key3 in the database, this query will return 2, since only key1 and key3 exist in the database.

Was alles duidelijk?

Bedankt voor je feedback!

Sectie 2. Hoofdstuk 3

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