What are the five data types of redis and their usage scenarios?
Redis supports five data types: strings, lists, hash tables, ordered sets and unordered sets. These types are suitable for storing various data scenarios, such as text data, ordered lists of elements, mapped key-value data, collections of elements sorted by scores, and unique collections of elements.
Redis five data types and usage scenarios
Redis is a NoSQL key-value database that supports five Basic data types:
1. String
- Description: A series of bytes that can be used as text data, binary data or any other type The data.
- Scenario: Store post content, user preferences, and configuration settings.
2. List
- Description: An ordered sequence of elements, elements can be added or removed from both ends of the list.
- Scenario: Store to-do lists, message queues, and rankings.
3. Hash table
- Description: A data structure that maps keys and values, allowing fast lookup and update of data.
- Scenario: Store user data (such as name, email, address), product catalog.
4. Ordered set
- Description: An ordered set of elements with unique members and supports sorting by score.
- Scenario: Store tasks sorted by priority, leaderboard rankings, and time series data.
5. Unordered set
- Description: A collection of elements that does not support sorting.
- Scenario: Store a unique set of elements (e.g. tags, user IDs), set membership checks.
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