SQL query does not give me correct search results

Question

I have the code below for a search box with some fields input into the query.
I want to be able to select all and only give results for a match of all the selected results.
I know I have to use AND in the query.
But it is giving me other cars in the results.
So if I choose Alfa Romeo a BMW will be listed in the results too.
$query = array();
if(!empty($_GET[c]))
    $query[] = "cars_listings.CategoryID = '$_GET[c]' ";
if(!empty($_GET[AgentID]))
    $query[] = "cars_listings.AgentID = '$_GET[AgentID]' ";
if(!empty($_GET[search_country]))
    $query[] = "cars_agents.country = '$_GET[search_country]' ";
if(!empty($_GET[search_state]))
    $query[] = "cars_agents.state = '$_GET[search_state]' ";
if(!empty($_GET[search_city]))
    $query[] = "cars_agents.city = '$_GET[search_city]' ";
//if(!empty($_GET[postcode]))
//    $query[] = "cars_agents.postcode = '$_GET[postcode]' ";
if(!empty($_GET[min]))
    $query[] = "cars_listings.price >= '$_GET[min]' ";
if(!empty($_GET[max]))
    $query[] = "cars_listings.price <= '$_GET[max]' ";
if(!empty($_GET[year1]))
    $query[] = "cars_listings.VehicleYear >= '$_GET[year1]' ";
if(!empty($_GET[year2]))
    $query[] = "cars_listings.VehicleYear <= '$_GET[year2]' ";
if(!empty($_GET[before]))
    $MyDate = strtotime("-$_GET[before]");
    $query[] = "cars_listings.DateAdded >= '$MyDate' ";
if(!empty($_GET[cars]))
    $query[] = "cars_listings.VehicleMake <= '$_GET[cars]' ";
if(!empty($query))
    $MyQuery = implode(" and ", $query);
    $MyQuery = " and ".$MyQuery;
//////////        order by
$order = array(); 
if(!empty($_GET[orderby]))
    $MyOrder = explode("|", $_GET[orderby]); 
    while(list(,$ov) = each($MyOrder))
        if($ov == "DateAdded")
            $order[] = " cars_listings.DateAdded desc ";
        if($ov == "Price")
            $order[] = " cars_listings.Price asc ";
        if($ov == "address")
            $order[] = " cars_agents.address asc ";
else
    if(!empty($_GET[p]))
        $order[] = " cars_listings.Price asc ";
    if(!empty($_GET[r]))
        $order[] = " cars_listings.mileage asc ";
    if(!empty($_GET[vehicle]))
        $order[] = " cars_vehicle.VehicleName ";
if(count($order) > '0')
    $MyOrder = implode(", ", $order); 
if(empty($MyOrder))
    $MyOrder = " order by cars_agents.PriorityLevel desc, cars_listings.DateAdded desc";
else
    $MyOrder = " order by cars_agents.PriorityLevel desc, $MyOrder, cars_listings.DateAdded desc";
if(!empty($_GET[Start]))
    $Start = $_GET[Start];
else
    $Start = '0';
$ByPage = '20';
$pcode = $_GET[postcode];
$q1 = "select * from cars_listings, cars_agents, cars_priority, cars_vehicle where cars_listings.AgentID = cars_agents.AgentID and cars_agents.PriorityLevel = cars_priority.PriorityLevel and cars_agents.AccountStatus = 'active' and cars_listings.VehicleMake = cars_vehicle.VehicleID $MyQuery $MyOrder limit $Start, $ByPage "; 
I hope that is clear to you.
This code was given to me by my client to amend with a postcode function.
Problem is the postcode database table always outputs 3miles

Answer 1

SELECT * FROM LFBK
                 INTO TABLE <ITABL>
                 FOR ALL ENTRIES IN IT_TIBAN
                 WHERE BANKN EQ IT_TIBAN-BANKN.
As the Data element of TIBAN-BANKN and LFBK-BANKN is different, i afraid FOR ALL ENTRIES will also not work.. any way try or else compare with other keys like....
SELECT * FROM LFBK
                 INTO TABLE <ITABL>
                 FOR ALL ENTRIES IN IT_TIBAN
                 WHERE BANKS eq IT_TIBAN-BANKS
                 AND       BANKL eq IT_TIBAN-BANKL
                 AND       BKNOT eq IT_TIBAN-BKNOT.
If you list your requirement clear, then can help with create query with all tables...
Thanks & Regards,
SUJI.