Question

I’m trying to count the number of rows selected from a table by using the count() function. But it always returns either a ‘2’ for every query with a row/rows selected or a ‘1’ for every query with no row selected.

 $sql_usb="select item_name from req_item where item_name='USB Dongle'";
 $result_usb=mysql_query($sql_usb);
 $row_usb=mysql_fetch_array($result_usb);

 $sql_router="select item_name from req_item where item_name='Access Point/Router'";
 $result_router=mysql_query($sql_router);
 $row_router=mysql_fetch_array($result_router);

 $sql_laptop="select item_name from req_item where item_name='Laptop'";
 $result_laptop=mysql_query($sql_laptop);
 $row_laptop=mysql_fetch_array($result_laptop);

 $usb_inv=count($row_usb);
 $router_inv=count($row_router);
 $laptop_inv=count($row_laptop);


 $total_inv=$usb_inv+$router_inv+$laptop_inv;

I’ve also tried adding isset() (i.e. $usb_inv=count(isset($row_usb));)
and mysql_num_rows() (i.e. $usb_inv=mysql_num_rows($row_usb));)

both give a result of 1.

Answer 1

You have to use count in you mysql query like this

$SelectQuery = 'select Count(item_name) as [TotalUSB] from req_item where item_name='USB Dongle'

Then you can get the result by

$result = mysql_query($SelectQuery);
$row = mysql_fetch_array($result);

$USBCount = $row['TotalUSB'];