Kedu ka MySQL si ehichapụ tebụl data? MySQL nchekwa data hichapụ data table iwu/nkwupụta/syntax

MySQLKedu ka esi ehichapụ tebụl data?MySQL nchekwa datahichapụ iwu / nkwupụta / syntax datatable

MySQL hichapụ tebụl

Ọ dị mfe ihichapụ tebụl data na MySQL, mana ị kwesịrị ịkpachara anya mgbe ị na-ehichapụ tebụl, n'ihi na data niile ga-apụ n'anya mgbe emechara iwu nhichapụ.

ụtọ asụsụ

Ihe a bụ syntax izugbe maka ihichapụ tebụl MySQL:

DROP TABLE table_name ;

Hichapụ tebụl data na windo iwu ozugbo

Na mysql> windo ozugbo ihichapụ tebụl data SQL nkwupụta bụ WỤPỤTA TABLE :

ihe atụ

Ọmụmaatụ ndị a na-ehichapụ tebụl data 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>

Hichapụ data nwere ike iji script PHP

PHP na-eji ọrụ mysqli_query ihichapụ tebụl MySQL.

Ọrụ ahụ nwere parampat abụọ wee weghachi TRUE ma ọ bụrụ na ogbugbu ahụ gara nke ọma, ma ọ bụghị ya, ọ ga-alaghachi FALSE.

h3> syntax

mysqli_query(connection,query,resultmode);

ihe atụ

Ihe atụ na-esonụ na-eji edemede PHP ihichapụ tebụl data 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);
?>

Mgbe emechara nke ọma, anyị enweghị ike ịhụ tebụl chenweiliang_tbl site na iji iwu a:

mysql> show tables;
Empty set (0.01 sec)