Data types supported by redis database

Redis database supports multiple data types, including: string, hash, list, set, ordered set, stream, bitmap, geospatial and HyperLogLog. Choosing the appropriate data type depends on data structure, access patterns, and space efficiency. With careful selection, Redis can be optimized for performance and storage efficiency.

Data types supported by Redis database

Redis is a popular NoSQL database that supports a variety of data types to meet different data storage and retrieval needs.

String

• The most basic data type, used to store text or binary data.
• Supports string splicing, splitting and other operations.

Hash

• Stores a collection of key-value pairs.
• Both keys and values ​​can be strings or other data types.
• Commonly used to store objects or mappings.

List

• An ordered collection of elements, stored in insertion order.
• Supports element addition, deletion and random access.

Set

• An unordered and non-duplicate collection of elements.
• Commonly used to store unique values ​​or member sets.

Ordered Set

• An ordered collection of elements, sorted by a specific score.
• Commonly used to store ranking or score-related data.

Stream

• is used to store an unlimited sequence of messages.
• Supports message appending, reading and pruning.

Bitmap

• Compactly represents a large collection of binary data.
• Each bit represents the existence of an element.

Geospatial

• Stores geographical location data such as longitude and latitude.
• Supports geographical queries, such as finding nearby points or calculating distances.

HyperLogLog

• An efficient data structure for approximately calculating the number of unique elements in a collection.
• Commonly used to estimate the number of unique elements in large data sets.

Choose the appropriate data type

Choosing the appropriate data type depends on how the data is used and the access pattern. Consider the following:

• Data structure: Whether the data is unordered or ordered, whether unique keys or scores are required.
• Access Mode: How the data will be accessed, such as key, range, or score.
• Space efficiency: Different data types have different space overhead.

Redis performance and storage efficiency can be optimized by carefully selecting data types.

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