What is the difference between SQL and NoSQL databases?

Question

Accepted Answer

SQL databases are relational databases with structured data, while NoSQL databases are non-relational databases with flexible schema.

SQL databases use structured query language for defining and manipulating data, while NoSQL databases use different query languages or APIs.
SQL databases are table-based, with a predefined schema, while NoSQL databases are document, key-value, wide-column, or graph-based, with dynamic schema for unstructured data.
SQL databases are good for complex queries and transactions, while NoSQL databases are better for hierarchical data storage and real-time applications.
Examples of SQL databases include MySQL, PostgreSQL, Oracle, while examples of NoSQL databases include MongoDB, Cassandra, Redis.

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