What are the advantages of NoSQL compared to SQL?

Advantages of NoSQL over SQL include:

• Schema flexibility: NoSQL databases, unlike relational ones, do not require a predefined rigid data schema. This simplifies development and modifications, especially under rapidly changing requirements.
• Horizontal scalability: NoSQL systems are often designed for horizontal scaling (by adding new servers), making them more suitable for handling large volumes of data and high loads compared to vertical scaling of SQL (increasing the power of an existing server).
• High performance: For certain types of data and use cases (e.g., processing JSON documents, key-value), NoSQL databases can demonstrate better performance due to optimized storage and access structures tailored to specific data models.
• Diversity of data models: NoSQL covers various data models (document, key-value, graph, columnar), allowing the selection of the most suitable one for a specific task, which can simplify modeling and queries.
• Reduced normalization: In some NoSQL databases, denormalization is often preferred, which can lead to a reduction in join operations during queries and, consequently, improved performance.

Feature	SQL (Relational)	NoSQL
Data model	Tables with rows and columns	Diverse (documents, key-value, graphs, columns)
Schema	Rigid, predefined	Flexible, dynamic
Scalability	Vertical (usually)	Horizontal
Data schema	Normalized (usually)	Often denormalized
Queries	SQL (Structured Query Language)	Varies depending on the database
ACID	Usually strong (Atomicity, Consistency, Isolation, Durability)	Varies (often BASE: Basically Available, Soft state, Eventually consistent)