Bawo ni MySQL ṣe paarẹ tabili data kan? MySQL database pa aṣẹ tabili data / gbólóhùn / sintasi

MySQLBawo ni lati pa tabili data rẹ?MySQL databasepa aṣẹ datatable / gbólóhùn / sintasi

MySQL pa tabili

O rọrun pupọ lati pa awọn tabili data rẹ ni MySQL, ṣugbọn o yẹ ki o ṣọra pupọ nigbati o ba pa awọn tabili rẹ, nitori gbogbo data yoo parẹ lẹhin ṣiṣe pipaṣẹ piparẹ naa.

girama

Atẹle ni sintasi gbogbogbo fun piparẹ tabili MySQL kan:

DROP TABLE table_name ;

Pa data tabili ni pipaṣẹ window window

Ninu mysql> window tọ aṣẹ pipaṣẹ tabili tabili data SQL jẹ SINU TABI :

Apeere

Apẹẹrẹ atẹle npa tabili data rẹ chenweiliang_tbl:

root@host# mysql -u root -p
Enter password:*******
mysql> use chenweiliang;
Database changed
mysql> DROP TABLE chenweiliang_tbl
Query OK, 0 rows affected (0.8 sec)
mysql>

Pa datatable lilo PHP akosile

PHP nlo iṣẹ mysqli_query lati pa awọn tabili MySQL rẹ.

Iṣẹ naa ni awọn paramita meji ati pada TÒÓTỌ ti ipaniyan ba ṣaṣeyọri, bibẹẹkọ o pada FALSE.

h3> sintasi

mysqli_query(connection,query,resultmode);

Apeere

Apẹẹrẹ atẹle yii nlo iwe afọwọkọ PHP lati pa tabili data rẹ chenweiliang_tbl:

<?
php
$dbhost = 'localhost:3306'; // mysql服务器主机地址
$dbuser = 'root'; // mysql用户名
$dbpass = '123456'; // mysql用户名密码
$conn = mysqli_connect($dbhost, $dbuser, $dbpass);
if(! $conn )
{
 die('连接失败: ' . mysqli_error($conn));
}
echo '连接成功
';
$sql = 'DROP DATABASE chenweiliang';
$retval = mysqli_query( $conn, $sql );
if(! $retval )
{
 die('删除数据库失败: ' . mysqli_error($conn));
}
echo "数据库 chenweiliang 删除成功\n";
mysqli_close($conn);
?>

Lẹhin ipaniyan aṣeyọri, a ko le rii tabili chenweiliang_tbl nipa lilo aṣẹ atẹle:

mysql> show tables;
Empty set (0.01 sec)