在本章中,我们将学习删除表.
表删除非常简单,但请记住所有已删除的表都是不可恢复的.表删除的一般语法如下 :
DROP TABLE table_name ;
执行表删除有两个选项:使用命令提示符或PHP脚本.
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为删除表提供 mysql_query().只需将第二个参数传递给相应的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(! $retval ) { die('Could not delete table: ' . mysql_error()); } echo "Table deleted successfully\n"; mysql_close($conn); ?> </body> </html>
成功删除表后,您将看到以下输出 :
mysql> Table deleted successfully