我有 2 个不同的数据库，它们与出现在两个表中的主键“id”链接。
数据库中不同的 ID 有不同的记录。
我有一个按钮，当单击从两个数据库表中提取所有内容时，它们都出现在一个表中，所有记录在 td 单元格中相互堆叠。
像这样的东西：
Id----name----address---grade1----grade2---grade3---
Id----name----address---grade1----grade2---grade3---
Id----name----address---grade1----grade2---grade3---
Id----name----address---grade1----grade2---grade3---
Id----name----address---grade1----grade2---grade3---
Id----name----address---grade1----grade2---grade3---
我希望他们以以下格式打印出来：
ID - xxxxxx
name - xxxxxxx
address - xxxxxxx
与 id 关联的成绩表（多行，4 列）
ID - xxxxxx
name - xxxxxxx
address - xxxxxxx
与 id 关联的成绩表（多行，4 列）
ID - xxxxxx
name - xxxxxxx
address - xxxxxxx
与 id 关联的成绩表（多行，4 列
这是PHP代码
<style> table, td, caption { border: 2px solid black ; padding: 10px; } </style>
<style> td { border: 1px solid green ; width: 100px;} </style>
<style> caption { color: green ; } </style>
<?php
include ("../../php/account.php");
$dbh = mysql_connect ( $hostname, $username, $password )
or die ( "Unable to connect to MySQL database" );
mysql_select_db( $project );
$s="SELECT * from newstudent, grades where newstudent.id=grades.id";
($t=mysql_query($s)) or die('Error! Student not found!');
print "<table>";
print "<caption>";
print "Grade report for all the Registered Students";
print "</caption>";
print "<tr> <th>Student ID</th> <th>First Name</th> <th>Last Name</th> <th>Email</th> <th>Course ID</th> <th>Grade One</th> <th>Grade Two</th> <th>Grade Three</th> <th>Total</th>";
//2. Get rows $r
while ($r = mysql_fetch_array($t))
{
//3. Get columns of row $r["---"]
print "<tr>";
print "<td>";
print $r["id"];
print "</td>";
print "<td>";
print $r["firstname"];
print "</td>";
print "<td>";
print $r["lastname"];
print "</td>";
print "<td>";
print $r["email"];
print "</td>";
print "<td>";
print $r["subject"];
print "</td>";
print "<td>";
print $r["gradeone"];
print "</td>";
print "<td>";
print $r["gradetwo"];
print "</td>";
print "<td>";
print $r["gradethree"];
print "</td>";
print "<td>";
print $r["Total"];
print "</td>";
}
print "</table>";