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四、MariaDB 删除表

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在本章中,我们将学习删除表。

表删除很容易,但记住所有删除的表是不可恢复的。 表删除的一般语法如下 –

DROP TABLE table_name ;

存在执行表删除的两个选项:使用命令提示符或PHP脚本。

命令提示符

在命令提示符下,只需使用DROP TABLE SQL命令 –

root@host# mysql -u root -p
Enter password:*******
mysql> use PRODUCTS;
Database changed
mysql> DROP TABLE products_tbl

mysql> SELECT * from products_tbl
ERROR 1146 (42S02): Table 'products_tbl' doesn't exist

PHP 删除表脚本

PHP提供mysql_query()用于删除表。 简单地传递它的第二个参数适当的SQL命令 –

<html>
   <head>
      <title>Create a MariaDB Table</title>
   </head>

   <body>
      <?php
         $dbhost = 'localhost:3036';
         $dbuser = 'root';
         $dbpass = 'rootpassword';
         $conn = mysql_connect($dbhost, $dbuser, $dbpass);

         if(! $conn ) {
            die('Could not connect: ' . mysql_error());
         }
         echo 'Connected successfully<br />';

         $sql = "DROP TABLE products_tbl";
         mysql_select_db( 'PRODUCTS' );
         $retval = mysql_query( $sql, $conn );

         if(! $retval ) {
            die('Could not delete table: ' . mysql_error());
         }
         echo "Table deleted successfully
";

         mysql_close($conn);
      ?>
   </body>
</html>

成功删除表后,您将看到以下输出 –

mysql> Table deleted successfully


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