PHP MySQL Where 子句

PHP MySQL Where 子句WHERE 子句用于过滤记录。WHERE 子句WHERE 子句用于提取满足指定标准的的记录。语法SELECT column_name(s)FROM table_nameWHERE column_name operator value如需学习更多关于 SQL 的知识，请访问我们的 SQL教程。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 连接发送查询或命令。实例下面的实例将从 "Persons" 表中选取所有 FirstName='Peter' 的行：<?php$con=mysqli_connect("localhost","username","password","database");// 检测连接if (mysqli_connect_errno()){    echo "连接失败:





" . mysqli_connect_error();}$result = mysqli_query($con,"SELECT * FROM PersonsWHERE FirstName='Peter'");while($row = mysqli_fetch_array($result)){    echo $row['FirstName'] . " " . $row['LastName'];    echo "<br>";}?>以上代码将输出：Peter Griffin