QT : QSqlDatabase: QMYSQL driver not loaded [WINDOWS]

Question

Salam Alikom

Hi Everyone

i'm trying to create a QT interface to connect to MYSQL database but it's giving alwas an error

QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QODBC QODBC3 QPSQL QPSQL7

this my code

QSqlDatabase db1 = QSqlDatabase::addDatabase("QMYSQL");
db1.setHostName("localhost");
db1.setUserName("root");
db1.setPassword("");
db1.setDatabaseName("journal_machine");

i tried some solutions but it doesn't work

this my Configuration

QT Creator 2.8.1

QT 5.1.1 (MSVC2010 , 32bit)

Windows 10 64 bit

MySQL 5.6.17 installed with WampServer 2.5 (64bit)

Thanks in advance

Answer 1

It's late to answer, but this may be useful for future readers.

For project kit 64 bit use MySql 64 bit , and for project kit 32 bit use MySql 32 bit .

note: xx: 64 or 32

• qsqlmysql.dll and qsqlmysqld.dll files should be exist in <QtDir>\\mingw73_xx\\plugins\\sqldrivers folder.

• libqsqlmysql.a and libqsqlmysqld.a files should be exist in <QtDir>\\mingw73_xx\\lib folder.

• libmysql.dll file should be exist in <QtDir>\\mingw73_xx\\bin folder.

Now, you can build your project.

// comment:

If "QMYSQL driver not loaded" error persists, follow instrument:

1. Copy MySql folder from Program Files to a simple path. (for example: "D:/MySQL")

2. Go to "\\Src\\qtbase\\src\\plugins\\sqldrivers\\mysql" folder

3. Open mysql.pro as text.

4. Comment QMAKE_USE += mysql line using '#'. ( #QMAKE_USE += mysql )

5. Add following lines after that:

   LIBS += 'D:/MySQL/lib/libmysql.lib'

   INCLUDEPATH += 'D:/MySQL/include'

   DEPENDPATH += 'D:/MySQL/include'

6. Save file.

7. Open Qt 5.13.1 (MinGW 7.3.0 xx-bit).exe from start menu (for example).

8. Go to <QtDir>\\Src\\qtbase\\src\\plugins\\sqldrivers folder (use 'cd' command).

9. Use qmake mysql.pro command.

10. Use mingw32-make command.

11. If compile done successfully, go to <QtDir>\\Src\\qtbase\\src\\plugins\\sqldrivers\\plugins\\sqldrivers folder.

12. Copy qsqlmysql.dll and qsqlmysqld.dll files into <QtDir>\\mingw73_xx\\plugins\\sqldrivers folder.

13. Copy libqsqlmysql.a and libqsqlmysqld.a files into <QtDir>\\mingw73_xx\\lib folder.

// comment:

If error persists, follow instrument:

1. Download "MySQL Connector C 6.1" program and install it.
2. Go to <MySQL Connector C 6.1 Dir>\\bin folder.
3. Copy libmysql.dll file into <QtDir>\\mingw73_xx\\bin folder.