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# sql/overview/extract/main.cpp Example File

    /****************************************************************************
    ** $Id$
    **
    ** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
    **
    ** This file is part of an example program for Qt.  This example
    ** program may be used, distributed and modified without limitation.
    **
    *****************************************************************************/

    #include <qapplication.h>
    #include <qsqldatabase.h>
    #include <qsqlcursor.h>
    #include "../login.h"

    bool createConnections();

    int main( int argc, char *argv[] )
    {
        QApplication app( argc, argv );

        if ( createConnections() ) {
            QSqlCursor cur( "creditors" );

            QStringList orderFields = QStringList() << "surname" << "forename";
            QSqlIndex order = cur.index( orderFields );

            QStringList filterFields = QStringList() << "surname" << "city";
            QSqlIndex filter = cur.index( filterFields );
            cur.setValue( "surname", "Chirac" );
            cur.setValue( "city", "Paris" );

            cur.select( filter, order );

            while ( cur.next() ) {
                int id = cur.value( "id" ).toInt();
                QString name = cur.value( "forename" ).toString() + " " +
                               cur.value( "surname" ).toString();
                qDebug( QString::number( id ) + ": " + name );
            }
        }

        return 0;
    }

    bool createConnections()
    {

        QSqlDatabase *defaultDB = QSqlDatabase::addDatabase( DB_SALES_DRIVER );
        if ( ! defaultDB ) {
            qWarning( "Failed to connect to driver" );
            return FALSE;
        }
        defaultDB->setDatabaseName( DB_SALES_DBNAME );
        defaultDB->setUserName( DB_SALES_USER );
        defaultDB->setPassword( DB_SALES_PASSWD );
        defaultDB->setHostName( DB_SALES_HOST );
        if ( ! defaultDB->open() ) {
            qWarning( "Failed to open sales database: " +
                      defaultDB->lastError().driverText() );
            qWarning( defaultDB->lastError().databaseText() );
            return FALSE;
        }

        QSqlDatabase *oracle = QSqlDatabase::addDatabase( DB_ORDERS_DRIVER, "ORACLE" );
        if ( ! oracle ) {
            qWarning( "Failed to connect to oracle driver" );
            return FALSE;
        }
        oracle->setDatabaseName( DB_ORDERS_DBNAME );
        oracle->setUserName( DB_ORDERS_USER );
        oracle->setPassword( DB_ORDERS_PASSWD );
        oracle->setHostName( DB_ORDERS_HOST );
        if ( ! oracle->open() ) {
            qWarning( "Failed to open orders database: " +
                      oracle->lastError().driverText() );
            qWarning( oracle->lastError().databaseText() );
            return FALSE;
        }

        return TRUE;
    }