Question

我想在最后一列我想要添加这些列之后在现有数据库表中添加一些列... scritp对每个人都是可用的，所以不确定最后一列是什么。

$DB_Column = array (
        'About_Me' => "About", 
        'Avatar' => "Avatar",
        'Clan_Tag' => "Clan",
        'Month' => "Month",
        'Day' => "Day",
        'Year' => "Year",
        'Website' => "Website",
        'Website_Link' => "Link",
        'Website_Link1' => "Link1",
        'Email_Address' => "Email"
    );

$Database->exec('ALTER TABLE '.$DB_Table.' 

            ADD COLUMN '.$DB_Column['About_Me'].' VARCHAR(255),
            ADD COLUMN '.$DB_Column['Avatar'].' VARCHAR(255),
            ADD COLUMN '.$DB_Column['Clan_Tag'].' VARCHAR(255),
            ADD COLUMN '.$DB_Column['Month'].' VARCHAR(255),
            ADD COLUMN '.$DB_Column['Day'].' VARCHAR(255),
            ADD COLUMN '.$DB_Column['Year'].' VARCHAR(255),
            ADD COLUMN '.$DB_Column['Website'].' VARCHAR(255),
            ADD COLUMN '.$DB_Column['Website_Link'].' VARCHAR(255),
            ADD COLUMN '.$DB_Column['Website_Link1'].' VARCHAR(255),
            ADD COLUMN '.$DB_Column['Email_Address'].' VARCHAR(255) 
    ');

出现此错误：

致命错误：未捕获的异常＆＃39; PDOException＆＃39;与消息＆＃39; SQLSTATE [HY000]：一般错误：1接近＆＃34;，＆＃34;：语法错误＆＃39;在 C：\ xampp \ htdocs \ Webstats \ Functions.php：30堆栈跟踪：＃0 C：\ xampp \ htdocs \ Webstats \ Functions.php（30）：PDO-＆gt; exec（＆＃39; ALTER TABLE RCO ......＆＃39;）＃1 C：\ xampp \ htdocs \ Webstats \ Index.php（3）：要求（＆＃39; C：\ xampp \ htdocs ...＆＃39;）＃2 {main}投入第30行的C：\ xampp \ htdocs \ Webstats \ Functions.php

Answer 1

ALTER TABLE statement只允许一列。

Answer 2

You cannot add more than one column using alter table command.

enter image description here

PDO Alter表添加多列SQLite

2 个答案: