Junior — Middle
How do relational databases and non-relational data storage systems differ?
sobes.tech AI
Answer from AI
Relational databases (RDBMS) and non-relational (NoSQL) data storage systems differ in structure, storage methods, and data processing.
Relational databases:
- Store data in tables with a fixed schema (rows and columns).
- Use SQL for queries.
- Support transactions and data integrity (ACID).
- Well-suited for complex queries and relationships between data.
Non-relational databases:
- Can store data as documents, key-value pairs, graphs, or columns.
- Flexible or absent schema.
- Often scale horizontally.
- Used for large volumes of data, high write speeds, or specific structures.
Example:
- Relational: SQL Server, PostgreSQL
- Non-relational: MongoDB (documents), Redis (key-value), Cassandra (columnar)
The choice depends on data requirements and application needs.