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我有這些代碼：PHP mysql如何連接兩個表
<?php
$records = mysql_connect('localhost', 'root', '') or die(mysql_error());
mysql_select_db('records', $records);
if(isset($_GET['src']))
{
$sql = "SELECT * FROM students where studentnumber like '%{$_GET['src']}%'";
$cnt = mysql_num_rows(mysql_query($sql));
if ($cnt == 0)
{
echo "<script>alert('No Record Found');</script>";
}
$result = mysql_query($sql, $records);
echo "<table border='0' class='table table-striped table-bordered table-hover'>";
echo "<tr class='info'><td width='10%'>Name</td><td width='11%'>Course Yr-Sec</td><td width='10%'>Student Number</td><td width='10%'>Violation</td><td width='10%'>Punishment</td><td width='9%'>Violation Date</td><td width='7%'>Punishment Date</td><td width='5%'>CS Length</td><td width='4%'>CS Done</td><td width='4%'>CS Left</td><td width='17%'><center>Action</center></td></tr></tr>";
while($row = mysql_fetch_array($result))
{
echo "<tr>";
echo "<td>";
echo $row['Lastname'];
echo ", ";
echo $row['Firstname'];
echo " ";
echo $row['Middleinitial'];
echo "</td>";
echo "<td>";
echo $row['Course'];
echo " ";
echo $row['Year'];
echo "-";
echo $row['Section'];
echo "</td>";
echo "<td>";
echo $row['Studentnumber'];
echo "</td>";
echo "<td>";
echo $row['Violation'];
echo "</td>";
echo "<td>";
echo $row['Punishment'];
echo "</td>";
echo "<td>";
echo $row['Violationdate'];
echo "</td>";
echo "<td>";
echo $row['Punishmentstartdate'];
echo "</td>";
echo "<td>";
echo $row['CSlength'];
echo "</td>";
echo "<td>";
echo $row['CSDone'];
echo "</td>";
echo "<td>";
echo $row['CSLeft'];
echo "</td>";
echo "<td>";
echo "<a href='edit.php?no={$row['ID']}'><input type='button' name='edit' value='Edit' class='btn btn-success'></a>";
echo " <a href='delete.php?no={$row['ID']}'><input type='button' name='delete' value='Delete' class='btn btn-danger'></a>";
echo " <input type='button' name='view' value='View' class='btn btn-info'>";echo "</td>";
echo "</tr>";
}
echo "</table>";
}
else
{
$sql = 'SELECT * FROM students';
$result = mysql_query($sql, $records);
echo "<table border='0' class='table table-striped table-bordered table-hover'>";
echo "<tr class='info'><td width='10%'>Name</td><td width='11%'>Course Yr-Sec</td><td width='10%'>Student Number</td><td width='10%'>Violation</td><td width='10%'>Punishment</td><td width='9%'>Violation Date</td><td width='7%'>Punishment Date</td><td width='5%'>CS Length</td><td width='4%'>CS Done</td><td width='4%'>CS Left</td><td width='17%'><center>Action</center></td></tr></tr>";
while($row = mysql_fetch_array($result))
{
echo "<tr>";
echo "<td>";
echo $row['Lastname'];
echo ", ";
echo $row['Firstname'];
echo " ";
echo $row['Middleinitial'];
echo "</td>";
echo "<td>";
echo $row['Course'];
echo " ";
echo $row['Year'];
echo "-";
echo $row['Section'];
echo "</td>";
echo "<td>";
echo $row['Studentnumber'];
echo "</td>";
echo "<td>";
echo $row['Violation'];
echo "</td>";
echo "<td>";
echo $row['Punishment'];
echo "</td>";
echo "<td>";
echo $row['Violationdate'];
echo "</td>";
echo "<td>";
echo $row['Punishmentstartdate'];
echo "</td>";
echo "<td>";
echo $row['CSlength'];
echo "</td>";
echo "<td>";
echo $row['CSDone'];
echo "</td>";
echo "<td>";
echo $row['CSLeft'];
echo "</td>";
echo "<td>";
echo "<a href='edit.php?no={$row['ID']}'><input type='button' name='edit' value='Edit' class='btn btn-success'></a>";
echo " <a href='delete.php?no={$row['ID']}'><input type='button' name='delete' value='Delete' class='btn btn-danger'></a>";
echo " <input type='button' name='view' value='View' class='btn btn-info'>";
echo "</td>";
echo "</tr>";
}
echo "</table>";
}
?>
它包含了搜索，編輯，刪除和查看功能......現在我的問題是...我想加入的兩個表數據庫由列studentnumber ... 我的表學生包含列姓，名，中初級，課程，年，部分，學號，違規，處罰，Violationdate，懲罰開始日期，CSlength，ID，CSDone，CSLeft ...現在我的另一個名爲students2的表包含以下行ID，學號，違規，處罰，Violationdate，懲罰開始日期，CSlength，CSDone，CSLeft ...我想要顯示我的兩個表中的信息...例如，我想要查看所有記錄從數據庫的ds從20101000的學生數量...我有內部加入表嗎？ 我只是一個新手在PHP ... 在此先感謝... :)
請在你的問題和期望列中添加表結構。 –
可能重複[MySQL連接where子句]（http://stackoverflow.com/questions/1219909/mysql-join-with-where-clause） –
Lastname（varchar），Firstname（varchar），Middleinitial（varchar）， （日期），CSlength（int），ID（int，primary）鍵，自動增量），CSDone（int），CSLeft（int）... 我想獲取所有列在這兩個表中...鑑於另一個表沒有所有的信息，因爲第一個表有它.. 。@AbhikChakraborty ... – Xthiahn29