QMYSQL driver not loaded

[sepehr]

You should ship the Qt MySQL driver (qmysql.dll) and MySQL client library (mysqlclient.dll or mysql.dll or something like that). The driver has to be placed in the sqldrivers subdirectory of your application's installation directory and MySQL library either in the installation directory or in a system directory (like C:\Windows\System32).

from QT docs

Plugins work differently to normal DLLs, so we can't just copy them into the same directory as our application's executable as we did with the Qt DLLs. When looking for plugins, the application searches in a plugins subdirectory inside the directory of the application executable.

So to make the plugins available to our application, we have to create the plugins subdirectory and copy over the relevant DLLs:

plugins\pnp_basictools.dll
plugins\pnp_extrafilters.dll

it was not mentioned that sql drivers DLL files should be put in a subdirectory called sqldrivers within plugins directory,thanks wysota