嗨，我试图从数据库中删除某些列数据。这是我的删除查询代码。
var val="foo.bar";
var safevalue=encodeURIComponent(val).replace(/\./g, '%2E');
首先我将house_details数据插入数据库，但我只需删除该列中的特定数据
答案 0 :(得分：2)
你想要的是function get_mime_type($filename) {
$idx = explode( '.', $filename );
$count_explode = count($idx);
$idx = strtolower($idx[$count_explode-1]);
$mimet = array(
'txt' => 'text/plain',
'htm' => 'text/html',
'html' => 'text/html',
'php' => 'text/html',
'css' => 'text/css',
'js' => 'application/javascript',
'json' => 'application/json',
'xml' => 'application/xml',
'swf' => 'application/x-shockwave-flash',
'flv' => 'video/x-flv',
// images
'png' => 'image/png',
'jpe' => 'image/jpeg',
'jpeg' => 'image/jpeg',
'jpg' => 'image/jpeg',
'gif' => 'image/gif',
'bmp' => 'image/bmp',
'ico' => 'image/vnd.microsoft.icon',
'tiff' => 'image/tiff',
'tif' => 'image/tiff',
'svg' => 'image/svg+xml',
'svgz' => 'image/svg+xml',
// archives
'zip' => 'application/zip',
'rar' => 'application/x-rar-compressed',
'exe' => 'application/x-msdownload',
'msi' => 'application/x-msdownload',
'cab' => 'application/vnd.ms-cab-compressed',
// audio/video
'mp3' => 'audio/mpeg',
'qt' => 'video/quicktime',
'mov' => 'video/quicktime',
// adobe
'pdf' => 'application/pdf',
'psd' => 'image/vnd.adobe.photoshop',
'ai' => 'application/postscript',
'eps' => 'application/postscript',
'ps' => 'application/postscript',
// ms office
'doc' => 'application/msword',
'rtf' => 'application/rtf',
'xls' => 'application/vnd.ms-excel',
'ppt' => 'application/vnd.ms-powerpoint',
'docx' => 'application/msword',
'xlsx' => 'application/vnd.ms-excel',
'pptx' => 'application/vnd.ms-powerpoint',
// open office
'odt' => 'application/vnd.oasis.opendocument.text',
'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
);
if (isset( $mimet[$idx] )) {
return $mimet[$idx];
} else {
return 'application/octet-stream';
}
}
，而不是UPDATE，因为你想保留行，但只是清除/空白/取消设置行中的某些列。
DELETE请注意，在查询中使用$res = "UPDATE house_details SET
rental_annual_rent = NULL,
rental_block = NULL,
rental_street = NULL,
rental_area = NULL,
rental_town = NULL,
rental_state = NULL,
rental_pincode = NULL
WHERE house_details_id='$id'";
输入之前，您应该真正清理它，您应该对其进行参数化，还应该从id库迁移到mysqli或{ {3}}