I am using Microsoft SQL server database file (file with .mdf extension) as the database.
I managed to save files into the SQL table as varbinary(max). Now my question is : How do I get back the files?
I am thinking I may still need to use SELECT statement to get the file from the SQL table. However how do I save the file to my hard disk from its current binary format? What are the procedures to do that?
Related
I've tried exporting a table which it has 5 TEXT columns and 1 BLOB column, this last column is used for storing images.
But, when I export the database table into a csv file (by using the software SQLite Database Browser) the information of this columns is transformed into TEXT as well. (Perhaps I was wrong)
How can I export BLOB data from my sqlite db table to a sql server table?
I will be so thankful if you help me. Please!! (I'm programming a c# application, but It doesn't matter, because I'm using SQLite Database Browser 2.0 b1.exe to see the data.)
I have an application that needs to upload .mdf and .ldf files and convert them into an excel file in the website and then allow them to be downloaded on the client computer. I have no idea how to start and what to do?
Can someone give me some ideas about how to convert a database in .mdf and .ldf files into excel file
Thanks in advance.
I think you can't simple Convert the file.
You should go through these steps:
Create a connection to your database
Select all Rows und Columns you need from you tables in the database
This should helpe you: ADO.Net
Create a new Excel-Sheet (Take a look at Open XML)
This should heklp you: Create Excel-Sheet
Fill you Excel-Sheet with the selected datas from your Database
Save the Excel Sheet
Now you are ready!
Have a read of this document which describes - How to import data from Microsoft SQL Server into Microsoft Excel
You're not going to be able to do this, for the simple reason that even after you upload the files you're not going to be able to attach them to the SQL server instance to query them (and then follow the process suggested by #BendEg).
Edit:
Seems I wasn't quite correct if you look at this link you can attach to a uploaded database by specifying the AttachDbFilename in the connection string.
Its easy just do the following
Right click your database-->GO to tasks-->Go to import data
I have a sql database, need to archive the database into filesystem (excel files).
Is the size of the data will increased or not when I migrate to filesystem?
I am doing archive through C# and save into files.
Some of the experts suggested the data of the filesystem is more as compared to the sql data.
Is it right or wrong?
I want to run a query on a MySQL database and insert the results in a SQL-Server 2008 R2 database.
In my table (MySQL database) there are multiple columns and one of them contains a file path. I want to use that path to insert the actual file as BLOB in my SQL-server.
So all columns from MySQL need to be inserted in SQL-server and the actual file as BLOB.
I can connect and query the MySQL database and also connect my SQL-Server.
But how can i insert the results. (some files are very large !!)
I found someting about OPENROWSET, but i could not find a good example inserting the metadata and the file.
I want to write a C# app for this. I appreciate any help.
SQL-Server 2008 R2 Support file stream. (http://technet.microsoft.com/en-us/library/bb933993.aspx)
BLOBs can be standard varbinary(max) data that stores the data in tables
FILESTREAM varbinary(max) objects that store the data in the file system
If Objects that are being stored are, on average, larger than 1 MB you shoul go with filestream.
As #Pongsathon.keng mentioned in his response FileStream is an option. You need to enable your DB to support FileStream and the user that is writing cannot be a sql login (Keep that in mind). You can use a varbinary(max) also mentioned (Image will be deprecated).
We decided to go with FileStream so we could also utilize it in conjunction with FUll-Text Indexing. You could also go with the typical "Store File Path" approach and store the actual files / blogs in a file system. FileStream gives you the added benefit of backing up files with the DB and apply permissions / transactions, etc.
Really depends on what you are doing.
Some good articles on FileStream Here and Here
I want to save a pdf and mp3 file(s) to a SQL Server database and be able to retrieve from it.
I'm still starting out with LINQ and don't master it yet.
You need to convert these into byte arrays (System.Data.Linq.Binary). One line to load
var myMp3 = new Binary(File.ReadAllBytes(mp3Filename));
If you create your database schema (VarBinary in the database) and drag the table over from Server Explorer into the DBML designer, it'll do everything for you.
To start off with your going to have a binary field in your database to save the file to.
Are you using LinqToSql, EntityToSql, or? Need some more information...
But once you get an object with a []byte to save the file to then it just a matter of making the appropriate Save() call... but with having some more information it hard to say.
Did you google tutorials?
Here is one that I found: Uploading Binary files or Images using LINQ to SQL
Has example code and sql to generate dummy tables...