T-SQL writing a blob to an external file

Having just figured out how to use OPENROWSET(BULK '...', SINGLE_BLOB) to read binary data from the file system into my SQL Server database, I now need to do the opposite:

Given an "image" type column in a table, I need T-SQL script to write this to a file somewhere on the file system. Again, ideally as NATIVE as possible.

(dang - why are examples of this so hard to find?)

So imagine your select statement to get the blob is

SELECT [data] from [dbo].[blobtable] where [id] = 5

the [data] happens to represent a JPG, so what I need is a wee bit o' T-SQL code that will write [data] out of the above select to 'C:\test.jpg'

many thanks
LVL 4
WernerVonBraunAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Guy Hengel [angelIII / a3]Billing EngineerCommented:
there are some methods:
http://www.sqlservercentral.com/articles/Miscellaneous/writingtoafileusingthesp_oacreatestoredprocedurean/1694/

note: the methods all write TEXT, however the ones with vbscript or sp_oaxxxx methods should be easily modifiable to write binary data.
0
WernerVonBraunAuthor Commented:
:-(

I'm not sure it would be easy to modify them to write binary data. The only way I can imagine that would work is by using an ADODB.Stream - however in that case I would at some stage need to store the data locally in a variable of a binary type, and SQL Server dinnae like that?
0
RiteshShahCommented:
look at example in below link, there is a way to store image file in table (in blog article) and retrieve it back to file system in SQL Server itself (in comment given by the reader of blog).


http://blog.sqlauthority.com/2009/03/06/sqlauthority-news-author-visit-toronto-canada-insert-image-in-database/

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
WernerVonBraunAuthor Commented:
damn. It involves invoking an external .exe but at least it's "native":

bcp "SELECT BULKCOLUMN from OpenRowSet(BULK 'somefile', SINGLE_BLOB) DMSData" queryout yetanotherfile -U someusername -P itspassword -n
0
WernerVonBraunAuthor Commented:
obviously instead of the OpenRowSet I used above you can select a blob from another table
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft SQL Server 2005

From novice to tech pro — start learning today.