获取所选列的总和

Question

在此表格中，我想搜索一个时间段，而位置广告会将搜索结果搜索到另一个页面。

这是我搜索后得到的页面。 （search.php中）

<table class="table" id="keywords" cellspacing="0" cellpadding="0">
<thead>
    <tr> 
    <th><span>ID</span></th> 
    <th><span>Name</span></th>
    <th><span>Location</span></th>
    <th><span>Date</span></th>
    <th><span>Catagory</span></th>
    <th><span>Labour-Supplier</span></th> 
    <th><span>In-time</span></th>
    <th><span>Out-time</span></th>
    <th><span>Day</span></th>
    <th><span>Day Rate</span></th>
    <th><span>Salary</span></th>
    <th><span>OT-hours</span></th>
    <th><span>OT-rate</span></th>
    <th><span>OT-amount</span></th>
    <th><span>Allowance II</span></th>
    <th><span>TotalSalary</span></th>
    <th><span>Advance</span></th>
    <th><span>Salary-to-hand</span></th> 
</tr>
</thead>

<?php
    if(isset($_POST['submit'])){
    if(isset($_GET['go'])){
    $Location=$_POST['Location'];


    $query = mysql_query("SELECT ID,Name,Location,Date,Category,LabourSupplier,Day,DayRate,Salary,OTHours,OTrate,OTAmount,Allowance2,TotalSalary,Advance,SalaryToHand FROM attendance WHERE Date BETWEEN '".$_POST["FDate"]."' AND '".$_POST["TDate"]."' AND Location LIKE '%" . $Location . "%' ORDER BY location DESC, Date DESC",$connection)
        or die("Failed to query database" . mysql_error());

        while ($row = mysql_fetch_array($query)) {

                print "<tr>"; 
                print "<td >"  . $row['ID'] . "</td>"; 
                print "<td >" . $row['Name'] . "</td>"; 
                print "<td >" . $row['Location'] . "</td>"; 
                print "<th >" . $row['Date'] . "</th>";
                print "<td >" . $row['Category'] . "</td>";
                print "<td >" . $row['LabourSupplier'] . "</td>";
                print "<th >" . $row['InTime'] . "</th>";
                print "<th >" . $row['OutTime'] . "</th>"; 
                print "<th >" . $row['Day'] . "</th>"; 
                print "<th >" . $row['DayRate'] . "</th>"; 
                print "<th >" . $row['Salary'] . "</th>"; 
                print "<th >" . $row['OTHours'] . "</th>"; 
                print "<th >" . $row['OTrate'] . "</th>"; 
                print "<th >" . $row['OTAmount'] . "</th>"; 
                print "<th >" . $row['Allowance2'] . "</th>"; 
                print "<th >" . $row['TotalSalary'] . "</th>"; 
                print "<th >" . $row['Advance'] . "</th>"; 
                print "<th>" .  $row['SalaryToHand'] . "</th>"; 
                print "</tr>"; 
                }
                }

            }
                print "</table>"; 

                ?>

我希望得到表格底部的日，工资，加班时间，加班金额，总薪资和工资的总和。有没有办法可以做到这一点，或者我应该在另一张表中得到这笔钱。

PS我试图在新表中得到总和，但这不起作用。

<?php

    if(isset($_POST['submit'])){
    if(isset($_GET['go'])){
    $Location=$_POST['Location'];


    $query = mysql_query("SELECT ID,Name,Location,sum(Day),sum(Salary),sum(OTHours),sum(OTAmount),sum(TotalSalary),sum(Advance),sum(SalaryToHand) FROM attendance WHERE Date BETWEEN '".$_POST["FDate"]."' AND '".$_POST["TDate"]."' AND Location LIKE '%" . $Location . "%' ORDER BY location DESC, Date DESC",$connection)
        or die("Failed to query database" . mysql_error());

        while ($row = mysql_fetch_array($query)) {

                print "<tr>"; 
                print "<td >"  . $row['ID'] . "</td>"; 
                print "<td >" . $row['Name'] . "</td>"; 
                print "<td >" . $row['Location'] . "</td>"; 
                print "<th >" . $row['Day'] . "</th>"; 
                print "<th >" . $row['Salary'] . "</th>"; 
                print "<th >" . $row['OTHours'] . "</th>"; 
                print "<th >" . $row['OTAmount'] . "</th>"; 
                print "<th >" . $row['TotalSalary'] . "</th>"; 
                print "<th >" . $row['Advance'] . "</th>"; 
                print "<th>" .  $row['SalaryToHand'] . "</th>"; 
                print "</tr>"; 
                }
                }

            }
                print "</table>"; 

                ?>

Answer 1

尝试此SQL查询：

// Get parameter
$fDate = $_POST["FDate"];
$tDate = $_POST["TDate"];
// Build SQL query
$sql = <<<SQL
    SELECT '' AS ID,
           '' AS Name,
           '' AS Location,
           SUM(Day) AS Day, 
           SUM(Salary) AS Salary,       
           SUM(OTHours) AS OTHours,
           SUM(OTAmount) AS OTAmount, 
           SUM(TotalSalary) AS TotalSalary,
           SUM(Advance) as Advance,
           SUM(SalaryToHand) as SalaryToHand
    FROM   attendance 
    WHERE  Date BETWEEN '{$fDate}' AND '{$tDate}' 
    AND    Location LIKE '%{$Location}%' 
    ORDER BY location DESC, Date DESC
SQL;
// Excecute it
$query = mysql_query($sql ,$connection) or die("Failed to query database" . mysql_error());
// Handle result
while ($row = mysql_fetch_array($query)) {
  ...
}

请记住，这不是安全的查询（不要将$ _POST param直接放入SQL，请使用prepare语句）。

@ Strawberry是对的，mysqli是一个比mysql更安全的驱动程序。有空的时候想想迁移。