How to insert blob data in oracle table

how to insert blob data in oracle table

How to insert a BLOB image from a client PC

It depends on what kind of data you want put into a BLOB. Let's consider the table: create table b1 (id number, b blob); If your data represented as hex-string you should use TO_BLOB function. This is in the now familiar two part structure with an HTML form and a form-handler. The INSERT statement uses a bind value to represent the BLOB. The new Db class insertBlob () will associate the BLOB data with the bind variable and commit the record. The uploaded image will be added to the PICTURES table.

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Active 4 years, 9 months ago. Viewed 19k times. Improve this question. Add a comment. Active Oldest Votes. It depends on what kind of data you want put into a BLOB. Improve this answer.

Naeel Maqsudov Naeel Maqsudov 1, 9 9 silver badges 20 20 bronze badges. And i want to fetch the pdf file from the database to my jsp page. Regarding to JSP there are two ways, I think. See examlpe — Naeel Maqsudov How to make your pictures beautiful 1 '14 at Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.

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Creating a Table to Store the Logo

CREATE TABLE tab1 (id NUMBER, blob_data BLOB); We import the file into a BLOB datatype and insert it into the table. Using an INSERT statement to put BLOB data into a table has some limitations if you need to cast a long string constant to a BLOB. (See String limitations.) You may be better off using a binary stream, as in the following code fragment. If you want to store the BLOB image on the server, you must write code to either "push" or "pull" it, not a good approach: RISKY - PUSH BLOB - Use an FTP program to transfer the BLOB to a known directory on the server. After FTP is complete, invoke PL/SQL to load it.

This is in the now familiar two part structure with an HTML form and a form-handler. PHP has various options controlling locations and upper sizes of files, refer to the PHP documentation. The AnyCo application will use the default values. The insertBlob method accepts a final option parameter for normal bind variables. Run the AnyCo application in a browser and log in Administrator. Click the Upload Logo link in the left hand menu. Locate a JPEG image on your computer and select it.

The next section of this chapter will display the image in the page header with the title, so choose an image of 15 to 20 pixels in height. Displaying the logo is similar in concept to how the graph image was displayed in the previous chapter.

This queries the most recent logo and sends it back as a JPEG stream. If the image appears corrupted, comment out the header and echo function calls and check if any text or white space is being emitted by the script. The user name check differs from those used in previous sections. The logo is displayed on all pages including the login page before the web user name is known. The code here shows the column being returned as a locator instead.

This shows how a locator can be operated on, here using the load to read all the data and free method to free up resources. If you had an application with very large data, the locator read method could be used to process the LOB in chunks, which would be a memory efficient way of processing large data streams.

If an application processes multiple images or chunks of an image sequentially in a loop, for example:. This optimization is not needed by the AnyCo application. The logo is displayed in Page::printHeader. Every standard page of the application will show the logo. Rerun the application to verify this:. Keeping images in the database allows the complete application data to be backed up and shared across all applications.

However for performance you could consider implementing a caching technique that writes the logo to disk so it can be streamed directly without requiring the overhead of database access. The upload form could regenerate the disk file each time a new image is uploaded. Fetching the Logo and Creating an Image Displaying the logo is similar in concept to how the graph image was displayed in the previous chapter.

Rerun the application to verify this: Keeping images in the database allows the complete application data to be backed up and shared across all applications.

3 Replies to “How to insert blob data in oracle table”

  1. Thanks for the video, i would like to see in the next similar test Roguekiller, instead of superantispyware, which is almost dead. Thanks in advance.

  2. I really appreciate you being clear on the terminology and the proper names for things within the application.

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