QSqlDriver

QSqlDriver is a Qt class that provides an interface for interacting with databases using SQL. It is part of the Qt Database module and is used as a base class for other database driver classes.

The QSqlDriver class inherits from the QObject class and provides several pure virtual functions that must be implemented by database driver classes. These functions include createTable, dropTable, exec, prepare, and others. The goal of these functions is to enable database-specific code to be encapsulated within the driver class.

QSqlDriver classes are instances of the QSqlDriver plugin, which provides a low-level interface to the underlying database mechanism. Each database driver class is responsible for implementing the interface of the QSqlDriver class and interacting with the specific database it targets.

Database driver classes for popular databases such as MySQL, PostgreSQL, and SQLite are already implemented in Qt, making it easy to use them in Qt-based applications. These drivers allow users to connect to and interact with their databases using the Qt framework.

QSqlDriver classes can also be used as a base class for custom database drivers. This allows developers to create their own database drivers for specific databases or use-cases, making it easier to support less common databases.

The main purpose of the QSqlDriver class is to abstract the database system away from the application code, providing a higher-level interface to interacting with databases. By using QSqlDriver classes, developers can create more database-agnostic and portable code for their Qt-based applications. This makes it easier to switch between different database systems or support new ones as they become available.