What is the primary purpose of Structured Query Language (SQL)?

The primary purpose of Structured Query Language (SQL) is to manage and query databases. SQL is a standardized programming language specifically designed for handling data held in a relational database management system (RDBMS). It allows users to perform various operations on the data, such as inserting, updating, deleting, and retrieving information.

SQL facilitates efficient data manipulation and enables complex queries to be constructed, making it essential for database administration and management. By using SQL, users can easily interact with the database to retrieve specific information, which is a fundamental task for applications that require data storage and retrieval.

In contrast, the other options refer to tasks outside the scope of SQL's functionality. For instance, designing computer hardware involves the creation of physical components and circuits, which is unrelated to database management. Creating multimedia presentations focuses on content development for presentations, which does not involve database operations. Developing mobile applications pertains to writing software for mobile devices, which may utilize databases but does not directly involve SQL. Thus, the role of SQL is uniquely positioned within data management.