| QSqlDatabase | Represents a connection to a database |
| QSqlDriver | Abstract base class for accessing specific SQL databases |
| QSqlDriverCreator | Template class that provides a SQL driver factory for a specific driver type |
| QSqlDriverCreatorBase | The base class for SQL driver factories |
| QSqlDriverPlugin | Abstract base for custom QSqlDriver plugins |
| QSqlError | SQL database error information |
| QSqlField | Manipulates the fields in SQL database tables and views |
| QSqlIndex | Functions to manipulate and describe database indexes |
| QSqlQuery | Means of executing and manipulating SQL statements |
| QSqlQueryModel | Read-only data model for SQL result sets |
| QSqlRecord | Encapsulates a database record |
| QSqlRelation | Stores information about an SQL foreign key |
| QSqlRelationalDelegate |
| QSqlRelationalTableModel | Editable data model for a single database table, with foreign key support |
| QSqlResult | Abstract interface for accessing data from specific SQL databases |
| QSqlTableModel | Editable data model for a single database table |