我对PHP或MySQL不是很熟悉，但在这里研究之后，我已经能够学习并非常接近我需要的东西并构建我的第一个求和查询。我试图根据几个变量读取数据库和求和值。
我需要reservation_pax为8:00的预订表中的reservation_time reservation_hidden = 0和reservation_date。我可以手动输入日期并且有效。我现在正在尝试使用脚本中已有的会话代码，或者找到根据所选日期动态添加的方法。
这是我在没有动态方面或会话的情况下工作的代码。
$result = mysql_query("SELECT SUM(reservation_pax)
FROM reservations
WHERE reservation_time = '8:00:00'
AND reservation_date = '2014-10-27'
AND reservation_hidden ='0'") ;
if ($result === false) {
die(mysql_error()); // TODO: better error handling
}
while($row = mysql_fetch_array($result)) {
echo $row['SUM(reservation_pax)'];
}
以下是我输入上述内容的页面的完整代码。任何人都可以帮我弄清楚如何调用所选日期而不必手动输入。
<!-- Begin reservation table data -->
<br/>
<table class="global resv-table-small" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<?php
echo "<td class='noprint'> </td>";
echo "<td>Time</td>";
echo "<td>Guests/Type</td>";
echo "<td>Name</td>";
echo "<td>Special Instructions/Notes</td>";
echo "<td class='noprint'>Table</td>";
echo "<td class='noprint'>Status</td>";
echo "<td class='noprint'>Created</td>";
echo "<td class='noprint'>Details/Delete</td>";
echo "</tr>";
// Clear reservation variable
$reservations ='';
if ($_SESSION['page'] == 1) {
$reservations = querySQL('all_reservations');
}else{
$reservations = querySQL('reservations');
}
// reset total counters
$tablesum = 0;
$guestsum = 0;
if ($reservations) {
//start printing out reservation grid
foreach($reservations as $row) {
// reservation ID
$id = $row->reservation_id;
$_SESSION['reservation_guest_name'] = $row->reservation_guest_name;
// check if reservation is tautologous
$tautologous = querySQL('tautologous');
echo "<tr id='res-".$id."'>";
echo "<td";
// daylight coloring
if ($row->reservation_time > $daylight_evening){
echo " class='evening noprint'";
}else if ($row->reservation_time > $daylight_noon){
echo " class='afternoon noprint'";
}else if ($row->reservation_time < $daylight_noon){
echo " class='morning noprint'";
}
echo " style='width:10px !important; padding:0px;'> </td>";
echo "<td id='tb_time'";
// reservation after maitre message
if ($row->reservation_timestamp > $maitre['maitre_timestamp'] && $maitre['maitre_comment_day']!='') {
echo " class='tautologous' title='"._sentence_13."' ";
}
echo ">";
echo "<strong>".formatTime($row->reservation_time,$general['timeformat'])."</strong></td>";
echo "<td id='tb_pax'><strong class='big'>".$row->reservation_pax."</strong> <span class='noprint'>";
printType($row->reservation_hotelguest_yn);
//echo "<img src='images/icons/user-silhouette.png' class='middle'/>";
echo "</span></td><td style='width:10%' id='tb_name'><span class='noprint'>".printTitle($row->reservation_title)."</span><strong> <a id='detlbuttontrigger' href='ajax/guest_detail.php?id=".$id."'";
// color guest name if tautologous
if($tautologous>1){echo" class='tautologous tipsy' title='"._tautologous_booking."'";}
echo ">".$row->reservation_guest_name."</a></strong>";
// old reservations symbol
if( (strtotime($row->reservation_timestamp) + $general['old_days']*86400) <= time() ){
echo "<img src='images/icons/clock-bolt.png' class='help tipsyold middle smicon' title='"._sentence_11."' />";
}
// recurring symbol
if ($row->repeat_id !=0) {
echo " <img src='images/icons/loop-alt.png' alt='"._recurring.
"' title='"._recurring."' class='tipsy' border='0' >";
}
echo"</td><td style='width:10%' id='tb_note'>";
if ($_SESSION['page'] == 1) {
echo $row->outlet_name;
}else{
echo $row->reservation_notes;
}
echo "</td>";
if($_SESSION['wait'] == 0){
echo "<td class='big tb_nr' style='width:85px;' id='tb_table'><img src='images/icons/table_II.png' class='tipsy leftside noprint' title='"._table."' /><div id='reservation_table-".$id."' class='inlineedit'>".$row->reservation_table."</div></td>";
}
echo "<td class='noprint'><div>";
getStatusList($id, $row->reservation_status);
echo "</div></td>";
echo "<td class='noprint'>";
echo "<small>".$row->reservation_booker_name." | ".humanize($row->reservation_timestamp)."</small>";
echo "</td>";
echo "<td class='noprint'>";
// MOVE BUTTON
// echo "<a href=''><img src='images/icons/arrow.png' alt='move' class='help' title='"._move_reservation_to."'/></a>";
// WAITLIST ALLOW BUTTON
if($_SESSION['wait'] == 1){
$leftspace = leftSpace(substr($row->reservation_time,0,5), $availability);
if($leftspace >= $row->reservation_pax && $_SESSION['outlet_max_tables']-$tbl_availability[substr($row->reservation_time,0,5)] >= 1){
echo" <a href='#' name='".$id."' class='alwbtn'><img src='images/icons/check-alt.png' name='".$id."' alt='"._allow."' class='help' title='"._allow."'/></a> ";
}
}
// EDIT/DETAIL BUTTON
echo "<a href='?p=102&resID=".$id."'><img src='images/icons/pen-fill.png' alt='"._detail."' class='help' title='"._detail."'/></a> ";
// DELETE BUTTON
if ( current_user_can( 'Reservation-Delete' ) && $q!=3 ){
echo"<a href='#modalsecurity' name='".$row->repeat_id."' id='".$id."' class='delbtn'>
<img src='images/icons/delete.png' alt='"._cancelled."' class='help' title='"._delete."'/></a>";
}
echo"</td></tr>";
$tablesum ++;
$guestsum += $row->reservation_pax;
}
}
?>
</tbody>
<tfoot>
<tr style="border:1px #000;">
<td class=" noprint"></td><td></td>
<td colspan="2" class="bold"><?php echo $guestsum;?> <?php echo _guest_summary;?></td>
<td></td>
<td colspan="2" class="bold"><?php echo $tablesum;?> <?php echo _tables_summary;?></td>
<td colspan="2" class="bold"><?php
$result = mysql_query("SELECT SUM(`reservation_pax`) FROM `reservations` WHERE `reservation_time` = '8:00:00' AND `reservation_date` = '{$_SESSION['selectedDate']}' AND `reservation_hidden` ='0'") ;
if($result === FALSE) {
die(mysql_error()); // TODO: better error handling
}
while($row = mysql_fetch_array($result))
{
echo $row['SUM(reservation_pax)'];
}
?>
<?php echo '/ 40 ', _guest_summary, ' -8:00 AM';?></td>
<td></td>
<?php
if($_SESSION['wait'] == 0){
//echo "<td></td>";
}
?>
</tr>
</tfoot>
</table>
<!-- End reservation table data -->
答案 0 :(得分：0)
您可以使用alias字段，如下：
$result = mysql_query("SELECT SUM(reservation_pax) AS reserve_sum
FROM reservations WHERE reservation_time = '8:00:00'
AND reservation_date = '2014-10-27'
AND reservation_hidden ='0'"
) ;
....
并以下列方式访问它：
while($row = mysql_fetch_array($result))
{
echo $row['reserve_sum'];
}
答案 1 :(得分：0)
$result = mysql_query("SELECT SUM(reservation_pax) FROM reservations WHERE reservation_time = '8:00:00' AND reservation_date = '{$_SESSION['selectedDate']}' AND reservation_hidden ='0'") ;
if($result === FALSE) {
die(mysql_error()); // TODO: better error handling
}
while($row = mysql_fetch_array($result))
{
echo $row['SUM(reservation_pax)'];
}
?>