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我有一个日志`保存员工的日志记录（赚取的金额等），还有一个代码将数据分成按每个员工 ID 分组的表：

Empid: 0001
---------------------------
| Logid   | Hours   | Pay |
---------------------------
|  1001   | 10      | 50  |
---------------------------
|  1002   | 2       | 10  |
---------------------------

Empid: 0003
---------------------------
| Logid   | Hours   | Pay |
---------------------------
|  1003   | 3       | 9   |
---------------------------
|  1004   | 6       | 18  |
---------------------------

我用以下半伪代码管理这个：

$query = mysql_query("SELECT * FROM `log` ORDER BY empid");
$id = 0;

while ($list = mysql_fetch_assoc($query)) {
    if ($id != $list['logid']) {
          create header (Logid, Hours, Pay)
          $id = $list['logid'];
          }
    add each data row for the empid
}

但是现在我想添加 Pay 列的总数，并将其放在每个 empid 的每个表的底部。

通过将代码 $total_pay = $total_pay + $list['pay'] 放在 while 循环中，我可以获得总工资，但我不知道如何在底部显示总工资。

非常感谢您对此提出任何建议！

4

2 回答 2

3

这应该这样做。你基本上总结，直到 id 发生变化。

$sum = 0;
while ($list = mysql_fetch_assoc($query)) {    
    if ($id != $list['logid']) {
          //create the totals using $sum !!!
          // after that re-set sum to 0
          $sum = 0;
          //create header (Logid, Hours, Pay)
          $id = $list['logid'];
    }
    $sum += $list['Pay'];
    //add each data row for the empid
}

还...

请不要mysql_*在新代码中使用函数。它们不再被维护并被正式弃用。看到红框了吗？改为了解准备好的语句，并使用PDO或MySQLi -本文将帮助您决定使用哪个。如果您选择 PDO，这里有一个很好的教程。

于 2013-02-22T13:20:52.560 回答
2

有两种方法可以做到这一点。

PHP

保持所有“支付”值的总和，并将其添加到底部的表格中。例如：

$i=0;
while ($list = mysql_fetch_assoc($query)) {   // for each row in your results
    if ($id != $list['EmployeeId']) {  // We only enter this loop if the EmployeeId doesn't equal $id. This can happen because either $id doesn't exist yet, or it doesn't match the previous EmployeeId
          $i++;  // increase $i by 1
          if($i>1) {  // Enter this loop only if $i is greater than or equal to 2 (if it is less than two, then this is our first time running this script, and adding a footer row wouldn't make any sense).
              create footer (EmployeeId, Hours, Pay);  // Log Id is irrelevant here
          }
          //  reset your variables here
          $id = $list['EmployeeId'];  // set $id = the first or the new Employee ID
          $total_pay = $list['pay'];  // This is our first time for this Employee, so don't just add it to the running total
          create header (EmployeeId, Hours, Pay) // Create the top half of your table
    } else {  // The EmployeeId has been established: we only need to change the running total
          $total_pay = $total_pay + $list['pay'];
    }
    //  add a data row for each LogId. This executes every time we go through the loop
    create_normal_row(LogId, EmployeeId, Hours, Pay)
}

// At this point, both Employees have a header, and all data rows. However, we left the loop before we could add the last Employee's footer row
// Let's add one more footer row for the last user
create_footer (Logid, Hours, Pay);

SQL

MySQL 有一个功能与您正在尝试做的事情非常相似，称为ROLLUP. 你可以在这里读更多关于它的内容：

http://dev.mysql.com/doc/refman/5.0/en/group-by-modifiers.html

基本上，您可以将查询更改为这样工作：

SELECT LogId, EmployeeId, SUM(Hours), SUM(Pay) FROM `log` 
GROUP BY empid, logid WITH ROLLUP

此查询将返回如下所示的数据集：

---------------------------------------
| Logid   | EmployeeId| Hours   | Pay |
---------------------------------------
|  1001   | 1         | 10      | 50  |
---------------------------------------
|  1002   | 1         | 2       | 10  |
---------------------------------------
|  NULL   | 1         | 12      | 60  |
---------------------------------------
|  1003   | 2         | 3       | 9   |
---------------------------------------
|  1004   | 2         | 6       | 18  |
---------------------------------------
|  NULL   | 2         | 9       | 27  |
---------------------------------------
|  NULL   | NULL      | 21      | 87  |
---------------------------------------

无论何时$list['Logid']为空，您都知道您有一个“总计”行。不过要小心，这将在数据集的底部添加“所有员工的总和”行。如果$list['EmployeeId']为空，那么您知道您在此“总计”行中。

在相关说明中（我不确定这是否是您所要求的），您可以使用 HTML<table>元素在表格中显示这些内容。

每行看起来像这样：

<table> <!-- shown at the beginning of each table -->
<tr> <!-- shown at the beginning of each row -->
<td> <!-- shown at the beginning of each table cell -->
Your text goes here
</td> <!-- shown at the end of each table cell -->
<td>
More text can go here
</td>
</tr> <!-- shown at the end  of each row -->
</table> <!-- shown at the end of each table -->

<tr>s 可以在每个<table>中无限重复，<td>s 可以在<tr>s 中重复。

于 2013-02-22T13:37:00.207 回答