@jsulm Thank you very much! This is exactly the problem, I set up mingw in the environment variable, which caused me to compile MSVC Qt using MINGW

No, you have to use the same compiler that was used to build Qt. You can't mix and match C++ librairies built with MinGW and MSVC.

@Sivamani-V said in How to connect to mysql server in ubuntu 16.04?.: QMYSQL Driver not loaded. Available drivers: QMYSQL QSQLITE QMYSQL3 This gets asked so many times, here & elsewhere. Googling for your message will bring up many hits. Under Linux/Ubuntu it's usually libmysqlclient or libqt5sql5-mysql or similar which is missing/has dependencies missing/wrong version.

IIRC, if you start from the git clone. Why not use the archive corresponding to your Qt version ?

@JonB @MrShawn Thanks you two for clarifying. After downloading/installing a MySQL server in a school computer, I could build/run my app on my computer and insert/update data successfully to the server. That part's all good. Thanks from y'all. Marking as solved.

Ok, thank You so much. I will try to do it, tomorrow.

@koahnig You're right, I think I'll go for it. Thx for your time et your help anyway.

Hi and welcome to devnet, Please search the forum a bit, I've already provided the solution several times for OS X/macOS.