$con=mysqli_connect("localhost","username","password","database"); // 检测连接 if(mysqli_connect_errno()) { echo"连接失败: ".mysqli_connect_error(); } mysqli_query($con,"UPDATE Persons SET Age=36 WHERE FirstName='Peter' AND LastName='Griffin'"); mysqli_close($con); ?> 在这次更新后,"Persons" 表如下所示: FirstNameLastNameAge PeterGriffin36 GlennQ...
首先,建立与数据库的连接。可以使用mysqli_connect函数来连接数据库,需要提供数据库的主机名、用户名、密码和数据库名作为参数。例如:$connection = mysqli_connect("localhost", "username", "password", "database"); 接下来,构建UPDATE查询语句并执行。使用mysqli_query函数执行UPDATE查询语句,并将返回的结果...
<?php $con=mysqli_connect("localhost","username","password","database");// 检测连接if(mysqli_connect_errno()){echo"连接失败: ".mysqli_connect_error();}mysqli_query($con,"UPDATE Persons SET Age=36 WHERE FirstName='Peter' AND LastName='Griffin'");mysqli_close($con);?> ...
UPDATE table_name SET column1=value, column2=value2,... WHERE some_column=some_value 注释:请注意 UPDATE 语法中的 WHERE 子句。WHERE 子句规定了哪些记录需要更新。如果您想省去 WHERE 子句,所有的记录都会被更新! 为了让 PHP 执行上面的语句,我们必须使用 mysqli_query() 函数。该函数用于向 MySQL 连...
在PHP中更新MySQL行,通常需要使用mysqli或PDO类来连接数据库,并执行UPDATE或INSERT语句。以下是一个简单的示例: 代码语言:php 复制 <?php// 连接数据库$conn=newmysqli('localhost','username','password','database_name');// 检查连接是否成功if($conn->connect_error){die("连接失败: ".$conn->connect...
使用Update查询更新 Mysql 表中的现有记录 <?php$user='root';$pass='';$db='sample tutorial';//Replace 'sample tutorial' with the name of your database$con=mysqli_connect("localhost",$user,$pass,$db);if($con->connect_error) {die("Connection failed: ".$con->connect_error);}// Since...
问题描述:使用update语句更新数据库字段,具体代码如下: $mysqli->query('BEGIN'); // 问题出在这里 $query = "UPDATE student SET date = now() WHERE id = '$id'"; $result= $mysqli->query($query) or die($mysqli->error);if($result) { ...
UPDATE语句的基本语法可以通过以下方式给出: UPDATEtable_nameSETcolumn1=value, column2=value2,...WHEREcolumn_name=some_value 让我们使用UPDATE语句和WHERE子句进行一个SQL查询,然后通过将其传递给PHP mysqli_query()函数来执行此查询,以更新表记录。请考虑演示数据库中的以下persons表: ...
<?php$con=mysqli_connect("localhost","username","password","database");//检测连接if(mysqli_connect_errno()) {echo"连接失败: " .mysqli_connect_error(); }mysqli_query($con,"UPDATE Persons SET Age=36 WHERE FirstName='Peter' AND LastName='Griffin'");mysqli_close($con);?> ...
$conn = new mysqli($servername, $username, $password, $dbname); if ($conn->connect_error) { die(“连接失败:” . $conn->connect_error); } “` 然后,可以使用以下代码执行更新语句: “`php $sql = “UPDATE table_name SET column1 = value1, column2 = value2 WHERE condition”; ...