I-MySQL iyicima njani itafile yedatha? I-database ye-MySQL yokucima umyalelo wetafile yedatha / ingxelo / i-syntax

MySQLIndlela yokucima itafile yedatha?MySQL databasecima umyalelo wedatha/ingxelo/isintaksi

Itafile yokucima i-MySQL

Kulula kakhulu ukucima iitafile zedatha kwi-MySQL, kodwa kufuneka uqaphele kakhulu xa ucima iitafile, kuba yonke idatha iya kunyamalala emva kokuphumeza umyalelo wokucima.

Igrama

Oku kulandelayo sisintaksi ngokubanzi yokucima itafile yeMySQL:

DROP TABLE table_name ;

Cima idatha yetafile kwifestile yomyalelo womyalelo

Kwi-mysql> iwindow ye-prompt ye-command cima itafile yedatha i-SQL statement is YIYIPHI ITABILE :

Umzekelo

Lo mzekelo ulandelayo ucima idatha yetafile 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>

Cima idatha yedatha usebenzisa iscript sePHP

I-PHP isebenzisa umsebenzi we-mysqli_query ukucima iitafile ze-MySQL.

Umsebenzi uneparameters ezimbini kwaye ubuyisela TRUE ukuba uphumezo luphumelele, kungenjalo ibuyisela FALSE.

h3> isintaksi

mysqli_query(connection,query,resultmode);

Umzekelo

Lo mzekelo ulandelayo usebenzisa iscript sePHP ukucima itafile yedatha 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);
?>

Emva kokuphunyezwa ngempumelelo, asikwazi ukubona itafile ye-chenweiliang_tbl ngokusebenzisa lo myalelo ulandelayo:

mysql> show tables;
Empty set (0.01 sec)