What are the characteristics of the five data types of redis

Redis provides five data types: string (storage text or numbers), list (linked list structure, supports insertion and deletion), hash (key-value pair storage), set (unordered collection, not Duplicate elements are allowed) and Sorted Sets (ordered sets, supports sorting and range queries). Each data type has unique characteristics and uses, for example strings can be used to store usernames and passwords, lists can be used to implement queue or FIFO (first in, first out) messaging, hashes can be used to store user attributes, and sets can be used to store labels , and ordered sets can be used to implement leaderboards.

Redis five data types and their characteristics

Redis provides five main data types, each Types all have unique characteristics and uses.

1. String

• Features: Binary safety, maximum length of 512MB, can store text, numbers, etc.
• Common scenarios: storing usernames, passwords, and cached content.

2. List

• Features: linked list structure, sequential insertion and deletion, support for insertion and retrieval of elements.
• Common scenarios: queue, FIFO (first in first out) or LIFO (last in first out) message delivery.

3. Hash

• Features: key-value pair storage, key is string, value can be string, list, hash Column etc.
• Common scenarios: storing user attributes and shopping cart information.

4. Collection

• Features: Unordered collection, no duplicate elements allowed, supports intersection, union and difference operations of sets.
• Common scenarios: tags, follower list.

5. Ordered set

• Features: Ordered set, elements have unique scores, supports sorting and range queries based on scores.
• Common scenarios: rankings, recently visited items.

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