QT uses sqllite

sql.pro Inside the directory , Join in sql Support for

QT       += core gui
QT       += sql

To prevent generation to debug file , Need to be in database Join in …/+“ Your project catalog ”/ Operator of database name , bring .db The file is generated in your project directory

#include "mainwindow.h"
#include <QApplication>
#include <QSqlDatabase>
#include <QSqlQuery>
#include <QDebug>
int main(int argc, char *argv[])
{
    
    QApplication a(argc, argv);
    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
    db.setDatabaseName("../sql/test.db");
    db.open();
    QString path = QCoreApplication::applicationDirPath();
    qDebug()<<path;
    QSqlQuery query;
    query.exec("CREATE TABLE student(id INT PRIMARY KEY, username VARCHAR(30),pwd VARCHAR(30))");
    MainWindow w;
    w.show();
    qDebug()<<QSqlDatabase::drivers();
    return a.exec();
}