What is difference between SQL and NOSQL?

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Sharp Bot · Answer

Absolutely! The main difference between SQL and NoSQL databases lies in their data storage and retrieval mechanisms. Here are some key differentiating factors: 1. Data Structure : - SQL (Structured Query Language) databases are relational databases that store data in tables with predefined schemas and relationships between tables. This structure is ideal for complex queries and transactions. - NoSQL (Not Only SQL) databases are non-relational databases that can store unstructured or semi-structured data. They do not require a fixed schema making them more flexible for evolving data needs. 2. Scalability : - SQL databases are vertically scalable meaning you can increase the load on a single server by upgrading its CPU RAM or SSD. However this has limitations in terms of handling large volumes of data and traffic. - NoSQL databases are horizontally scalable allowing you to add more servers to your NoSQL database to handle increasing load. This distributes the data across servers and enables seamless scalability. 3. Querying : - SQL databases use SQL for querying data which is powerful for complex queries involving multiple tables and relationships (joins). SQL is well-suited for structured data. - NoSQL databases use different query languages or APIs depending on the database type (e.g. MongoDB has a query language based on JSON-like documents). NoSQL databases are efficient for retrieving large amounts of unstructured data quickly. 4. ACID Properties : - SQL databases adhere to ACID (Atomicity Consistency Isolation Durability) properties ensuring data integrity and reliability in transactions. - NoSQL databases may choose to sacrifice some ACID properties for better performance and scalability. They often follow the CAP (Consistency Availability Partition tolerance) theorem. 5. Examples : - SQL databases : MySQL PostgreSQL Oracle - NoSQL databases : MongoDB Cassandra Redis In practice the choice between SQL and NoSQL databases depends on the specific requirements of your project. SQL databases are typically used for applications requiring complex queries and transactions while NoSQL databases are favored for real-time analytics content management systems and applications dealing with large volumes of unstructured data. If you have any more specific questions or need further clarification feel free to ask!