blob

问题 I will post this sample for anybody who need help with insert file to varbinary(max) field in sqlsrv DB. Also if you need to read from varbinary field, you can see how I made that. This code is working but all your comments and suggestions are welcome. This is sample table: CREATE TABLE [dbo].[files] ( [id] [int] NOT NULL IDENTITY(1, 1), [content] [varbinary] (max) NULL, [filename] [varchar] (max) COLLATE Croatian_CI_AS NULL ) First enter your data for server that you use. If you need to

问题 I just recently asked and solved a question pertaining to uploading .PDF files that are greater than 2 MB into a MySQL database as BLOBS. I had to change some settings in my php.ini file and MySQLs maximum packet setting. However, fixing this issue has led me to discover a new issue with my script. Now since I can upload files to my BLOB database I attempted to download the file for testing purposes. Much to my dismay when I went to open the .PDF file I received the following error: Failed to

问题 I have a database with a BLOB field (weeklyOccupancy). I am trying to access the data in PHP using: $sqlCmd = 'select weeklyOccupancy from Occupancy order by startDate;'; $pdoStmt = $dbh->query($sqlCmd); $pdoStmt->bindColumn(1, $lob, PDO::PARAM_LOB); $pdoStmt->fetch(PDO::FETCH_BOUND); foreach($pdoStmt as $row){ $weeklyData = stream_get_contents($lob); .... } However, stream_get_contents says that $lob is a string (named "Resource id #1) although I believe it should be a stream. I have seen

问题 i am trying to dump the BLOB fields from mysql table. but when i dumping blob records using sqlYog am getting unvaluable data. How can i backup BLOB type fields? Note: BLOB field has image. 回答1: The official mysqldump utility can dump BLOBs fields without any problem, use -q or --opt when you run the backup. So for example to backup images_table that contains image in BLOB format : mysqldump --opt -u user -ppass dbname images_table > images.sql 回答2: the parameter --hex-blob is useful when you

问题 I have to encrypt a file and save it in mysql as a blob, then decrypt it and make it available for download. I save the file in a blob like so: $certificate_tmp=$_FILES['certificate']['tmp_name']; $certificate=openssl_encrypt(file_get_contents($certificate_tmp),$ciphers,$password_tmp); $wpdb->insert("my_table",array("certificate"=>$certificate)); Note: I've cut unrelated code, the table is not just certificate, but I don't want this to get confusing. This is the download php page: $password

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 6 years ago . I have lots of blob data in my database, and I need to retrieve the weight (400kb, 14,2kb etc.) for each. How can I do that? 回答1: In SQL: SELECT some_key, LENGTH(blob_column) AS size_in_bytes FROM the_table In

问题 I am a newb with 6 months experience, self-taught via StackEx/books/etc. Created a pretty decent website with login/register and storing some info via mySQL. I have been through every single BLOB post here and I have some decent output. I think I, like most newbs, know enough to be dangerous, don't have the greatest foundation laid out so when it gets to serious understanding of built-in functions, arrays and passing arguments we can lose the flow and I basically think I have dug a hole by

问题 I want to make a blackberry app. which will store audio and video files into the sqlite database. Does blackberry have a special api for this? (special classes for byte[]) Can I store files into sqlite on blackberry? 回答1: Sure can. Have a look at using BLOB in version 3+. Why you'd want too instead of using links to the content, well, that's up to you and the particular application you're looking to create of course. Here's a good development guide from RIM on working with SQLite on the

问题 I'm having trouble writing to an Azure Block Blob from C++ using a SAS (Shared Access Signature). I'm using the Blob REST API and Poco. The HTTP request returns error 404 (resource does not exist), but I can't figure out what I'm doing wrong. I generate the SAS on the server in C# like this (seems to work fine): CloudStorageAccount storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("StorageConnectionString")); CloudBlobClient blobClient = storageAccount

问题 today i'm working on a MySQL Database, and i don't know how to Map a Byte[] to a BLOB Column... My Table looks this way: CREATE TABLE `images` ( `Id` INT NOT NULL AUTO_INCREMENT , `imgText` VARCHAR(45) NULL , `image` BLOB NULL , PRIMARY KEY (`Id`) ); Mapping: public class imagesMap : ClassMap<images> { public imagesMap() { Id(x => x.Id); Map(x => x.imgText); Map(x => x.image).CustomType<BinaryBlobType>(); } } Buisnessobject: public class images { public virtual int Id{get;set;} public virtual