@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.