public Object[][] getCustomers{

    AbstractSqlService mpx1SqlService = SERVICES.getService(Mpx1SqlService.class);
    AbstractSqlService mpx2SqlService = SERVICES.getService(Mpx2SqlService.class);
    AbstractSqlService mpx3SqlService = SERVICES.getService(Mpx3SqlService.class);

    String statement = "Select lastname, firstname, postalcode, city from customer";

    Object[][] resultdb1 = mpx1SqlService.select(statement);
    Object[][] resultdb2 = mpx2SqlService.select(statement);
    Object[][] resultdb3 = mpx3SqlService.select(statement);

    Object[][] totalResult = new Object[resultdb1.length + resultdb2.length + resultdb3.length][];
    System.arraycopy(resultdb1, 0, totalResult, 0, resultdb1.length);
    System.arraycopy(resultdb2, 0, totalResult, resultdb1.length, resultdb2.length);
    System.arraycopy(resultdb3, 0, totalResult, resultdb1.length + resultdb2.length, resultdb3.length);

    return totalresult[];
}