What are the 8 data types of redis

Redis provides 8 data types: string (text, number, binary), hash (key-value pair), list (ordered set), set (unordered unique element), ordered set ( Sort by score), Geospatial (geographic location), HyperLogLog (estimate big data cardinality), and Bitmap (bit sequence storage).

Redis’s 8 data types

Redis provides a variety of powerful data types to meet various needs. application scenario requirements. The following are the 8 data types supported by Redis:

1. String (String)

• It is composed of byte array
• Yes Store text, numeric or binary data
• Support connections and operations with other data types

2. Hash

• Stores a collection of key-value pairs
• Values ​​can be strings, hashes, lists, or sets
• Allows fast access and modification of values ​​in the hash table

3. List

• Ordered collection of elements
• Supports inserting, deleting or obtaining elements at both ends of the list
• Can store various data types

4. Set

• Unordered and unique set of elements
• Automatically delete duplicate elements
• Supports union, intersection and difference operations

5. Sorted Set

• Element collection based on score sorting
• Supports obtaining elements by score range and quantity range
• Commonly used to implement rankings and priority queues

6. Geospatial (Geo)

• Type of storing geospatial data
• Supports geographical location operations such as points, circles and rectangles
• Used to build location-based applications

7. HyperLogLog (HyperLogLog)

• Used to estimate the cardinality of large data collections
• The occupied space has a logarithmic relationship with the base number
• Commonly used to calculate the number of website visitors or deduplication statistics

8. Bitmap(Bitmap)

• Type for storing bit sequences
• Supports setting, getting and manipulating bit values
• Suitable for space-intensive applications such as log analysis and user tracking

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