Key Differences Between RDBMS and NoSQL DBMS

Relational Database Management System (RDBMS) and NoSQL Database Management System are two types of database management systems that differ in several key aspects:

1. Data Structure:

RDBMS stores data in tabular format with predefined schema, while NoSQL databases use various data models like document, key-value, graph, or wide-column stores.

2. Scalability:

RDBMS traditionally scales vertically by adding more hardware resources to a single server, whereas NoSQL databases scale horizontally by distributing data across multiple servers.

3. Schema Flexibility:

RDBMS requires a predefined schema that enforces data integrity, while NoSQL databases offer schema flexibility and can easily adapt to changing data requirements.

4. Query Language:

RDBMS primarily uses SQL (Structured Query Language) for querying data, while NoSQL databases may have their query languages specific to the data model they support.

5. ACID Properties:

RDBMS generally guarantee ACID (Atomicity, Consistency, Isolation, Durability) properties for transactions, whereas NoSQL databases may sacrifice some aspects of ACID properties for better performance or scalability.

These are some of the key differences between RDBMS and NoSQL DBMS that you should be aware of for your DBMS category interview preparation.