当我尝试获取此查询的 COUNT 时遇到问题
$query = "SELECT COUNT(*) AS counter FROM (";
$query .= "SELECT *, GROUP_CONCAT(orders.product) as PRO FROM id_of_orders,orders WHERE 1=1 AND orders.order_id = id_of_orders.id_order";
if(!empty($_SESSION['employees']))
$query .= " AND id_of_orders.username='$_SESSION[employees]'";
if(!empty($_SESSION['timis']))
$query .= " AND id_of_orders.price='$_SESSION[timis]'";
if(!empty($_SESSION['dates']))
$query .= " AND DATE(time)='$_SESSION[dates]'";
$query .= " GROUP BY id_order " ;
$query .= " LIMIT $offset, $rec_limit )" ;
$result = mysql_query($query);
$row = mysql_fetch_array($result);
$counter = $row['counter'];
echo $counter . '<br>' ;
while($row = mysql_fetch_array($result))
{
echo $row['id_order'] . ": -> " . $row['time']. " " .$row['username'] . " " . $row['price'] . " " . $row['PRO'] . '<br>';
}
从这个查询中,我从 $echo 计数器中一无所获
输出 :
11: -> 2013-08-18 17:29:39 skata 1.00 eee
35: -> 2013-08-11 15:03:01 0.00 frento,frento,frento,frapes
36: -> 2013-08-21 12:43:31 skata 0.00 frapes
37: -> 2013-08-21 12:43:55 skata 12.00 frento
如果我尝试这个查询:
$query = "SELECT *, COUNT(id_order) AS counter, GROUP_CONCAT(orders.product) as PRO FROM id_of_orders,orders WHERE 1=1 AND orders.order_id = id_of_orders.id_order";
if(!empty($_SESSION['employees']))
$query .= " AND id_of_orders.username='$_SESSION[employees]'";
if(!empty($_SESSION['timis']))
$query .= " AND id_of_orders.price='$_SESSION[timis]'";
if(!empty($_SESSION['dates']))
$query .= " AND DATE(time)='$_SESSION[dates]'";
$query .= " GROUP BY id_order " ;
$query .= " LIMIT $offset, $rec_limit" ;
$row = mysql_fetch_array($result);
$counter = $row['counter'];
echo $counter . '<br>' ;
while($row = mysql_fetch_array($result))
{
echo $row['id_order'] . ": -> " . $row['time']. " " .$row['username'] . " " . $row['price'] . " " . $row['PRO'] . '<br>';
}
输出 :
1 // <~~~ this is the echo $counter
11: -> 2013-08-18 17:29:39 skata 1.00 eee
35: -> 2013-08-11 15:03:01 0.00 frento,frento,frento,frapes
36: -> 2013-08-21 12:43:31 skata 0.00 frapes
37: -> 2013-08-21 12:43:55 skata 12.00 frento
我得到 1 ,这是错误的。
这些是表:id_of_orders:
id_order| time | username | price
35 |2013-08-11 15:03:01| |0.00
36 |2013-08-21 12:43:31|skata |0.00
37 |2013-08-21 12:43:55|skata |12.00
订单:
order_id | product | ulika
35 |frento |zaxari,fountoukia,troufa
35 |frento |zaxari,kakao
35 |frento |
36 |frapes |zaxari
37 |frento |
35 |frapes |
只是查询:
$query = (" SELECT *, GROUP_CONCAT(orders.product) as PRO
FROM id_of_orders,orders
WHERE 1=1
AND orders.order_id = id_of_orders.id_order
AND id_of_orders.username='$_SESSION[employees]
AND id_of_orders.price='$_SESSION[timis]'
AND DATE(time)='$_SESSION[dates]'
GROUP BY id_order
LIMIT $offset, $rec_limit ");