Introduction to Redis

Contenuti del Corso

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

Data Deletion

Managing data in Redis goes beyond simply adding or modifying it. There are scenarios where you might need to remove data, whether it's deleting specific keys or clearing an entire database.

DEL Command

The DEL command is used to delete one or more keys. If a key exists, its associated data is removed, and the command returns the number of keys deleted. If the key does not exist, the command does nothing.

You can delete multiple keys at once by listing them, separated by spaces:

The command removes two keys: user:1 and user:2. If these keys exist, Redis erases their data, releases the associated memory, and returns the total number of keys deleted, which in this case is 2.

FLUSHDB and FLUSHALL Commands

The FLUSHDB command removes all data from the current Redis database. Redis can handle multiple databases (16 by default, indexed from 0), and this command clears only the currently selected one.

Usage is straightforward; simply execute:

The FLUSHALL command is more powerful as it clears all data across all Redis databases, not just the current one.

To execute, use:

1. What does the `DEL` command do in Redis?

2. Which command removes all data in the current Redis database?

What does the DEL command do in Redis?

Select the correct answer

Deletes all keys in a database.

Deletes all data in the current Redis instance.

Deletes one or more specified keys.

Which command removes all data in the current Redis database?

Select the correct answer

DEL

FLUSHDB

UNLINK

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Come possiamo migliorarlo?

Grazie per i tuoi commenti!

Sezione 2. Capitolo 7

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Contenuti del Corso

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

Data Deletion

Managing data in Redis goes beyond simply adding or modifying it. There are scenarios where you might need to remove data, whether it's deleting specific keys or clearing an entire database.

DEL Command

The DEL command is used to delete one or more keys. If a key exists, its associated data is removed, and the command returns the number of keys deleted. If the key does not exist, the command does nothing.

You can delete multiple keys at once by listing them, separated by spaces:

The command removes two keys: user:1 and user:2. If these keys exist, Redis erases their data, releases the associated memory, and returns the total number of keys deleted, which in this case is 2.

FLUSHDB and FLUSHALL Commands

The FLUSHDB command removes all data from the current Redis database. Redis can handle multiple databases (16 by default, indexed from 0), and this command clears only the currently selected one.

Usage is straightforward; simply execute:

The FLUSHALL command is more powerful as it clears all data across all Redis databases, not just the current one.

To execute, use:

1. What does the `DEL` command do in Redis?

2. Which command removes all data in the current Redis database?

What does the DEL command do in Redis?

Select the correct answer

Deletes all keys in a database.

Deletes all data in the current Redis instance.

Deletes one or more specified keys.

Which command removes all data in the current Redis database?

Select the correct answer

DEL

FLUSHDB

UNLINK

Tutto è chiaro?

Come possiamo migliorarlo?

Grazie per i tuoi commenti!

Sezione 2. Capitolo 7

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