Question

我有问题从数据库中的两个表回显。如何从有条件的数据库中选择两个表？

<?php session_start(); 
  $con=mysql_connect("localhost","root","");
  $db=mysql_select_db("fyp2", $con);  
  $username=$_SESSION['username'];   
  $query="SELECT * FROM customer WHERE username='$username'";
  $result=mysql_query($query);      
  $row=mysql_fetch_array($result);  
?>

在这种情况下，只能显示一个表，我插入的另一个表不显示输出。

Answer 1

**请执行该查询**

<? include ("conn.php");
   $sql = "SELECT p.id,
                  p.name,
                  ps.name AS size_name
             FROM PRODUCT p
             JOIN PRODUCT_SIZES ps ON ps.size_id = p.size_id";
   $result = mysql_query($sql, $connection) or die(mysql_error());
   while($row = mysql_fetch_array($result)) {
?>
<tr>
  <td><? echo $row['id']; ?></td>
  <td><? echo $row['name']; ?></td>
  <td><? echo $row['size_name']; ?></td> 
</tr>
<? } ?>

PHPmyadmin，mySQL。如何选择多个表

1 个答案: