What language is commonly used for querying SQL databases?

The commonly used language for querying SQL databases is PL/SQL. PL/SQL stands for Procedural Language/SQL and is an extension of SQL that provides additional features like procedural programming capabilities. This allows developers to write complex database interactions using loops, conditions, and variables, enabling more robust and efficient SQL queries.

While SQL itself is the standard language for managing and retrieving data in relational database systems, PL/SQL enhances this by allowing for procedural logic, which is particularly useful for creating complex database applications that require more than just standard query execution. It is predominantly used with Oracle databases for tasks such as creating stored procedures, functions, triggers, and packages.

In contrast, Java, HTML, and Python are not primarily designed for querying databases in the same way. Java can interact with SQL databases through JDBC (Java Database Connectivity), but it is not specifically a query language. HTML is a markup language used for creating web pages and does not function as a query language. Python can use libraries to interact with SQL databases, but like Java, it is not a dedicated querying language in the context of SQL itself.