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  • 吴裕雄--天生自然 PHP开发学习:MySQL子句

    <?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 Persons ORDER BY age");
    
    while($row = mysqli_fetch_array($result))
    {
        echo $row['FirstName'];
        echo " " . $row['LastName'];
        echo " " . $row['Age'];
        echo "<br>";
    }
    
    mysqli_close($con);
    ?>
    <?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 Persons
    WHERE FirstName='Peter'");
    
    while($row = mysqli_fetch_array($result))
    {
        echo $row['FirstName'] . " " . $row['LastName'];
        echo "<br>";
    }
    ?>
    <?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);
    ?>
    <?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,"DELETE FROM Persons WHERE LastName='Griffin'");
    
    mysqli_close($con);
    ?>
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  • 原文地址:https://www.cnblogs.com/tszr/p/10955787.html
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