從數據庫中獲取記錄時的動態行跨度
[英]Dynamic rowspan while fetching records from database
問題描述
Ename Sal
tom 100
tom 200
bill 100
bill 250
bill 450
bill 400
這是查詢和 html 結構，它給出了上述 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>
<? }?>
我怎樣才能關注 output：
Ename Sal
tom 100
200
bill 100
250
450
400
4 個解決方案
解決方案1
7 2015-06-06 15:00:43
對不起我糟糕的英語：在這里我回答了這個問題How to show data from database with dynamic rowspan 。 讓我再次嘗試回答這個問題。 首先，以免我們處理 mysql 查詢。
MySql 工作：
在 mysql 查詢中，您尚未查詢 order by。 因為在現實生活中，你不能指望在所有的湯姆、賬單記錄之后。 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;
結果：
+-------+------+
| ename | sal |
+-------+------+
| tom | 100 |
| bill | 450 |
| bill | 100 |
| tom | 200 |
| bill | 250 |
| bill | 400 |
| James | 50 |
+-------+------+
因此，您的 mysql 查詢應按 ename 排序。 這里也應該訂購每個人的sal 。 所以我們的查詢：
SELECT * FROM emp ORDER BY ename, sal;
編碼：
- 整個任務我們可以分為 3 個部分。
- Mysql 數據獲取和存儲在數組中。
- 計算行跨度
- 印刷
MySql 數據獲取：
在從 mysql 服務器獲取數據期間，我們應該嘗試使用 mysql_fetch_assoc function 而不是 mysql_fetch_array。 因為mysql_fetch_assoc 只會返回ename 和sal。 但是 mysql_fetch_array 將返回索引為 ename、sal、0、1 的數組。
# 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']);
}
計算行跨度：
# 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;
}
當您將 print_r 數組 output 將是：
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>";
代碼優化：
現在我們可以結合行跨度計算和 mysql 數據獲取。 因為在將獲取的數據保存在數組中的過程中，我們可以計算行跨度。 所以我們的最終代碼：
<!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>
結果：
解決方案2
0 2014-11-12 08:37:13
應該是這樣的
<?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
?>
解決方案3
0 2011-05-30 08:10:12
像這樣的東西？
While data
echo
<tr>
<td rowspan="3"><p>numbers</p></td>
<td><p>1</p></td>
<td><p>2</p></td>
</tr>
請發布您的代碼
解決方案4
0 2011-05-30 12:48:30
您可以使用最后一行和當前行檢查這樣的條件。
$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>";
我希望這能幫到您。
使用rowspan從表中的數據庫中獲取記錄
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