How to add image (as BLOB Type) without using query in SQLite (SQLiteAdmin tool) table?
Related
I would like to do a Quicksight dashboard from a query where it does SQL NOT IN (in other table).
However when I go to Quicksight and add a data set or edit it I dont see an option to do custom SQL. I am using RDS/Mysql.
Any suggestions are welcome.
Thanks
It's not possible to switch to custom SQL mode while editing existing dataset if it was created for a specific DB table.
However, you can use custom SQL by creating a new data set using RDS datasource:
Suppose I want to use an Oracle database, and I have some flat binary file containing structured data. Suppose I have a relational model that fits this data structure.
Does Oracle provide an API to implement some adapter to be able to relationally query this sequence of bytes as a set of views?
If so:
where should the data reside?
what version offers this feature?
If no:
is there any other RDBMS that offers such an API?
You can use an external table. Normally, external tables must use text columns, but you can use the PREPROCESSOR directive to specify a script that will transform the source file before loading it.
You could also use UTL_FILE to load the table from disk and do whatever you want to it in the database. This could include a pipelined table function that you access with the TABLE operator.
I am working on hybrid mobile application in which I have a scenario to store images in to oracle database through web-API. I can get the images as base-64 encoded from API. So how can i save them to database and what datatype should I use to store them
If you want to insert image you can use BLOB data type . about how storing pictures in database check storing pic and photos and how to store image
I capture images within my app and need to store them. I'm not sure where the right place is to store the captured image. Storing the image as byte array in the database would be very nice but whats happening if the next-gen smartphones getting a high-resoltion camera and the images become bigger? Are they exceeding my database limit or my app becomes slowly?
Is it better to store the image into IsoStore?
I'd store in the isostore, if you want to use database, you might just store the path of the image or name to be able to find it from the isostore.
It should be faster to use isostore instead of database.
If you want to store image in database use blob type attribute in database,
Convert the image in byte-array and execute the database command.
To convert the object in byte array follow the link.
This answer is based on sqlite database.
I want to use Prawn or PDFkit library for generating PDF into my Rhomobile application.
Please suggest the process.
I was using pdf_writer which is supported by Rhomobile but there are issues including images in the generated pdfs.
Plz help
Adding image with using pdf_writer is possible but using tricky way. first you need to store that image in DB as a blob data, then through query you need to fetch blob data from that table and need to print that blob data on PDF.
Note : this is only applicable for for raw RGB formatted images.