Which of the following are some common RDBMS in use?OptionsAll of theseMySQLOracleHeidiSQL

To answer the question regarding common Relational Database Management Systems (RDBMS), let's analyze the options provided:

1. MySQL: A widely used open-source RDBMS known for its reliability and performance. It's commonly used in web applications and supports various data types.

2. Oracle: A powerful and highly robust commercial RDBMS used primarily in enterprise-level applications. It offers advanced features such as data warehousing and analytics.

3. HeidiSQL: While this is a popular graphical user interface (GUI) tool for managing RDBMS such as MySQL and PostgreSQL, it is not an RDBMS itself.

Since options MySQL and Oracle are indeed common RDBMS, the correct answer must include "All of these" since it typically refers to the inclusion of MySQL and Oracle, but excludes HeidiSQL from being classified as an RDBMS.

Final Answer

All of these (excluding HeidiSQL as it is not an RDBMS).