Which language is specifically designed to provide an interface to relational database systems?

SQL, or Structured Query Language, is specifically designed to interact with relational database management systems. It provides a standardized way to create, modify, manage, and query data stored in relational databases, making it an essential tool for database administrators and developers.

SQL allows users to perform various operations such as selecting data, inserting new records, updating existing records, and deleting data. It uses a syntax that is structured and declarative, enabling users to specify what they want to retrieve or manipulate without needing to outline the exact procedural steps to achieve the result. This abstraction simplifies the interaction with the database and allows for complex queries involving multiple tables through the use of joins and subqueries.

The other options, while useful in their own contexts, do not serve the same purpose as SQL. For example, Python and JavaScript are general-purpose programming languages used for a wide range of applications beyond database interaction. NoSQL represents a variety of database systems that do not adhere strictly to relational models, and while they may use their own query mechanisms, they are not specifically designed as a query language for relational databases like SQL is.