The Qt SQL module provides support for SQL databases. Qt SQL's APIs are divided into different layers:

• Driver layer
• SQL API layer
• User interface layer

The SQL Programming guide contains information about development using Qt SQL.

Using the Module

Using a Qt module requires linking against the module library, either directly or through other dependencies. Several build tools have dedicated support for this, including CMake and qmake.

Building with CMake

Use the find_package() command to locate the needed module components in the Qt6 package:

find_package(Qt6 COMPONENTS Sql REQUIRED)
target_link_libraries(mytarget PRIVATE Qt6::Sql)

See also the Build with CMake overview.

Building with qmake

To configure the module for building with qmake, add the module as a value of the QT variable in the project's .pro file:

QT += sql

Module Evolution

Changes to Qt SQL lists important changes in the module API and functionality that were done for the Qt 6 series of Qt.

Licenses and Attributions

Qt SQL is available under commercial licenses from The Qt Company. In addition, it is available under free software licenses: The GNU Lesser General Public License, version 3, or the GNU General Public License, version 2. See Qt Licensing for further details.

Furthermore, Qt SQL in Qt 6.0.4 may contain third party modules under following permissive licenses:

Related Information

These are links to the API reference materials and related pages.

• C++ Classes
• SQL Examples