从数据库中获取记录时的动态行跨度
[英]Dynamic rowspan while fetching records from database
问题描述
Ename Sal
tom 100
tom 200
bill 100
bill 250
bill 450
bill 400
这是查询和 html 结构，它给出了上述 output。
<?php
$sql = "select * from emp ";
$result= mysql_query($sql);
while($row=mysql_fetch_array($result))
{
<tr >
<td rowspan="" ><?php echo $row['ename']; ?></td>
<td><?php echo $row['esal']?></td>
</tr>
<? }?>
我怎样才能关注 output：
Ename Sal
tom 100
200
bill 100
250
450
400
4 个解决方案
解决方案1
7 2015-06-06 15:00:43
对不起我糟糕的英语：在这里我回答了这个问题How to show data from database with dynamic rowspan 。 让我再次尝试回答这个问题。 首先，以免我们处理 mysql 查询。
MySql 工作：
在 mysql 查询中，您尚未查询 order by。 因为在现实生活中，你不能指望在所有的汤姆、账单记录之后。 例如采取以下插入。
INSERT INTO test_work(ename, sal)
VALUES("tom", 100),
("bill", 450),
("bill", 100),
("tom", 200),
("bill", 250),
("bill", 400),
("James", 50);
SELECT * FROM test_work;
结果：
+-------+------+
| ename | sal |
+-------+------+
| tom | 100 |
| bill | 450 |
| bill | 100 |
| tom | 200 |
| bill | 250 |
| bill | 400 |
| James | 50 |
+-------+------+
因此，您的 mysql 查询应按 ename 排序。 这里也应该订购每个人的sal 。 所以我们的查询：
SELECT * FROM emp ORDER BY ename, sal;
编码：
- 整个任务我们可以分为 3 个部分。
- Mysql 数据获取和存储在数组中。
- 计算行跨度
- 印刷
MySql 数据获取：
在从 mysql 服务器获取数据期间，我们应该尝试使用 mysql_fetch_assoc function 而不是 mysql_fetch_array。 因为mysql_fetch_assoc 只会返回ename 和sal。 但是 mysql_fetch_array 将返回索引为 ename、sal、0、1 的数组。
# connect to mysql server
# and select the database, on which
# we will work.
$conn = mysql_connect('', 'root', '');
$db = mysql_select_db('test');
# Query the data from database.
$query = 'SELECT * FROM test_work ORDER BY ename, sal';
$result = mysql_query($query);
# Intialize the array, which will
# store the fetched data.
$sal = array();
$emp = array();
# Loop over all the fetched data, and save the
# data in array.
while($row = mysql_fetch_assoc($result)) {
array_push($emp, $row['ename']);
array_push($sal, $row['sal']);
}
计算行跨度：
# Intialize the array, which will store the
# rowspan for the user.
$arr = array();
# loop over all the sal array
for ($i = 0; $i < sizeof($sal); $i++) {
$empName = $emp[$i];
# If there is no array for the employee
# then create a elemnt.
if (!isset($arr[$empName])) {
$arr[$empName] = array();
$arr[$empName]['rowspan'] = 0;
}
$arr[$empName]['printed'] = "no";
# Increment the row span value.
$arr[$empName]['rowspan'] += 1;
}
当您将 print_r 数组 output 将是：
Array
(
[bill] => Array
(
[rowspan] => 4
[printed] => no
)
[James] => Array
(
[rowspan] => 1
[printed] => no
)
[tom] => Array
(
[rowspan] => 2
[printed] => no
)
)
使用行跨度打印：
echo "<table cellspacing='0' cellpadding='0'>
<tr>
<th>Ename</th>
<th>Sal</th>
</tr>";
for($i=0; $i < sizeof($sal); $i++) {
$empName = $emp[$i];
echo "<tr>";
# If this row is not printed then print.
# and make the printed value to "yes", so that
# next time it will not printed.
if ($arr[$empName]['printed'] == 'no') {
echo "<td rowspan='".$arr[$empName]['rowspan']."'>".$empName."</td>";
$arr[$empName]['printed'] = 'yes';
}
echo "<td>".$sal[$i]."</td>";
echo "</tr>";
}
echo "</table>";
代码优化：
现在我们可以结合行跨度计算和 mysql 数据获取。 因为在将获取的数据保存在数组中的过程中，我们可以计算行跨度。 所以我们的最终代码：
<!DOCTYPE html>
<html>
<head>
<style>
table tr td, table tr th{
border: black 1px solid;
padding: 5px;
}
</style>
</head>
<body>
<?php
# connect to mysql server
# and select the database, on which
# we will work.
$conn = mysql_connect('', 'root', '');
$db = mysql_select_db('test');
# Query the data from database.
$query = 'SELECT * FROM test_work ORDER BY ename, sal';
$result = mysql_query($query);
# $arr is array which will be help ful during
# printing
$arr = array();
# Intialize the array, which will
# store the fetched data.
$sal = array();
$emp = array();
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%#
# data saving and rowspan calculation #
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%#
# Loop over all the fetched data, and save the
# data.
while($row = mysql_fetch_assoc($result)) {
array_push($emp, $row['ename']);
array_push($sal, $row['sal']);
if (!isset($arr[$row['ename']])) {
$arr[$row['ename']]['rowspan'] = 0;
}
$arr[$row['ename']]['printed'] = 'no';
$arr[$row['ename']]['rowspan'] += 1;
}
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
# DATA PRINTING #
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%#
echo "<table cellspacing='0' cellpadding='0'>
<tr>
<th>Ename</th>
<th>Sal</th>
</tr>";
for($i=0; $i < sizeof($sal); $i++) {
$empName = $emp[$i];
echo "<tr>";
# If this row is not printed then print.
# and make the printed value to "yes", so that
# next time it will not printed.
if ($arr[$empName]['printed'] == 'no') {
echo "<td rowspan='".$arr[$empName]['rowspan']."'>".$empName."</td>";
$arr[$empName]['printed'] = 'yes';
}
echo "<td>".$sal[$i]."</td>";
echo "</tr>";
}
echo "</table>";
?>
</body>
</html>
结果：
解决方案2
0 2014-11-12 08:37:13
应该是这样的
<?php
$sql = "SELECT * FROM emp ";
$result= mysql_query($sql);
while($row=mysql_fetch_array($result)):
$ename = $row['ename'];
// count the esal in each ename
$sql2 = "SELECT * FROM emp WHERE ename=$ename";
$result2 = mysql_query($sql2);
$count_result2 = mysql_num_rows($result2);
?>
<tr >
<td rowspan="<?php echo $count_result2; ?>"><?php echo $row['ename']; ?></td>
<?php
// loop each esal
while($row2 = mysql_fetch_array($result2)):
?>
<td><?php echo $row['esal']; ?></td>
</tr>
<?php
endwhile; // endwhile for each esal looping
endwhile; // endwhile for the main looping
?>
解决方案3
0 2011-05-30 08:10:12
像这样的东西？
While data
echo
<tr>
<td rowspan="3"><p>numbers</p></td>
<td><p>1</p></td>
<td><p>2</p></td>
</tr>
请发布您的代码
解决方案4
0 2011-05-30 12:48:30
您可以使用最后一行和当前行检查这样的条件。
$sql = "select * from emp";
$result= mysql_query($sql);
echo "<table>";
while($row=mysql_fetch_array($result))
{
$now=$row[0];
if($last!=$now) {
echo "<tr><td>$row['ename']</td><td>$row['esal']</td></tr>";
}else{
echo "<tr><td> </td><td>$row['esal']</td></tr>";
}
$last = $row[0];
}
echo "</table>";
我希望这能帮到您。
使用rowspan从表中的数据库中获取记录
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.