我正在尝试将此查询运行到 php 中,但我无法做到,并且不知道代码到底出了什么问题。如果我通过 phpmyadmin 运行查询,它运行良好。请让我知道其中有什么问题。谢谢
<?php
$username = "cp";
$password = "aasfadasd";
$hostname = "localhost";
//connection to the database
$dbhandle = mysql_connect($hostname, $username, $password)
or die("Unable to connect to MySQL");
echo "Connected to MySQL";
//select a database to work with
$selected = mysql_select_db("smj",$dbhandle)
or die("Could not select examples");
$query = "UPDATE rot_galls JOIN rot_grs SET rot_galls.name = rot_grs.name WHERE(rot_galls.rgroup = rot_grs.id";
$result=mysql_query($query);
mysql_close($dbhandle);
?>