bool createDBTables()
{
    QSqlQuery query;
    query.exec("DROP TABLE contacts");
    return query.exec("CREATE TABLE contacts ("
                "id INTEGER PRIMARY KEY AUTOINCREMENT, "
                "name VARCHAR(256) NOT NULL, "
                "status VARCHAR(1024), "
                "profpic VARCHAR(256), "
                "register_state INTEGER NOT NULL, "
}

void MainWindows::showAccountDeactivation()
{
    QMessageBox msgBox(this);
    QFont font = msgBox.font();
    msgBox.setWindowTitle(CGlobalZone::m_softwareName);
    msgBox.setInformativeText(tr("Are you sure you want to remove your account?"));
    msgBox.setStandardButtons(QMessageBox::Ok| QMessageBox::Cancel);
    msgBox.setDefaultButton(QMessageBox::Cancel);
    msgBox.setButtonText(QMessageBox::Ok , tr("Ok"));
    msgBox.setButtonText(QMessageBox::Cancel , tr("Cancel"));
    int ret = msgBox.exec();
    switch (ret)
    {
       case QMessageBox::Ok:
        {
             createDBTables();
        }
            break;
        case QMessageBox::Cancel:
            QTimer::singleShot(1500, this, SLOT(close()));
            break;
    }
}

#ifndef MAIN_H
#defing MAIN_H

bool createDBTables();

#endif // MAIN_H

#include "Main.h"
...