Question

In my experience: the way to access mysql’s database , i should access mysql-server firstly and then access database..But if want to access sqlite’s database, i can access database file directly , just by a file(.db), so easy..

My question: can i access mysql database like sqlite ? Thank you!

The way to access mysql as follow:

QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
db.setHostName("localhost");
db.setDatabaseName("demo"); 
db.setUserName("root"); 
db.setPassword("root1");

if(db.open()) {
    qDebug("Make it");
} else {
    qDebug("Sorry");
}

the way to access sqlite as follow:

db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName("chat.db");

Answer 1

In your particular position you cannot access it in the same manner. As Adrian mentioned, SQL Lite is an embedded database, meaning it authenticates differently from a server-client model of MySQL.

Because the MySQL database is not local to the device, you must then use a MySQL user to connect to it. Otherwise, you pose a large security risk, as anyone with the server information could connect using the same string you’d want to connect with.