Realize the function of students filling out their applications on qt

void saveStudentInfo(QString &name, QString &sex, int age, int num, QString &class)
{
    QSqlQuery query;
    query.exec("create table studentInfo (name varchar(255), sex varchar(255), age int, num int, class varchar(255))");
    query.prepare("INSERT INTO studentInfo(name, sex, age, num, class) "
                  "VALUES (:name, :sex, :age, :num, :class)");
    query.bindValue(":name", name);
    query.bindValue(":sex", sex);
    query.bindValue(":age", age);
    query.bindValue(":num", num);
    query.bindValue(":class", class);
    query.exec();
}