What are the different types of MySQL databases?

1. MyISAM: MyISAM is the default storage engine in MySQL. It is a non-transactional storage engine that supports table-level locking. Example: MyISAM is used for data warehousing and web applications.

2. InnoDB: InnoDB is a transactional storage engine that supports row-level locking. It is the most popular storage engine for transactional applications. Example: InnoDB is used for online transaction processing (OLTP) applications.

3. Memory: Memory is a storage engine that stores data in memory. It is a non-transactional storage engine that supports table-level locking. Example: Memory is used for temporary tables and for high-performance applications.

4. Archive: Archive is a storage engine that stores data in a compressed format. It is a non-transactional storage engine that supports table-level locking. Example: Archive is used for storing historical data.

5. CSV: CSV is a storage engine that stores data in comma-separated values (CSV) format. It is a non-transactional storage engine that supports table-level locking. Example: CSV is used for importing and exporting data.

What is the difference between HBase and RDBMS?

HBase and RDBMS are both database management systems, but they are used for different purposes.

HBase is a non-relational, column-oriented database that is used for storing and managing large amounts of unstructured data. It is designed to store data that is constantly changing and growing in size. HBase is well-suited for applications that require random, real-time read/write access to large datasets. Examples include social media networks, online gaming, and large e-commerce websites.

RDBMS, on the other hand, is a relational database management system that is used for storing and managing structured data. It is designed to store data in a tabular form and is well-suited for applications that require complex data analysis and reporting. Examples include financial applications, online banking, and customer relationship management systems.