mysql教程删除数据sql语句用法
mysql教程删除数据sql语句用法 DELETE FROM 语句用于从数据库表中删除记录。 语法 DELETE FROM table_name WHERE column_name = some_value 注释:SQL 对大小写不敏感。DELETE FROM 与 delete from 等效。 为了让 PHP 执行上面的语句,我们必须使用 mysql_qu
mysql教程删除数据sql语句用法
DELETE FROM 语句用于从数据库表中删除记录。
语法
DELETE FROM table_name WHERE column_name = some_value
注释:SQL 对大小写不敏感。DELETE FROM 与 delete from 等效。
为了让 PHP 执行上面的语句,我们必须使用 mysql_query( 函数。该函数用于向 SQL 连接发送查询和命令。
例子
稍早时,,我们在本教程中创建了一个名为 "Person" 的表。它看起来类似这样:
FirstName LastName Age
Peter Griffin 35
Glenn Quagmire 33
下面的例子删除 "Person" 表中所有 LastName='Griffin' 的记录:
$con = mysql_connect("localhost","peter","abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("my_db", $con);
mysql_query("DELETE FROM Person WHERE LastName='Griffin'");
mysql_close($con);
?>
在这次删除之后,表是这样的:
FirstName LastName Age
Peter Griffin 35
注:更多精彩文章请关注三联编程教程栏目。

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