How to dump a file stored in a sqlite database as a blob?

Question

I have a sqlite3 database. One column has the TEXT type, and contains blobs which I would like to save as file. Those are gzipped files.

The output of the command

Answer 1

In my case, I use "hex" instead of "quote" to retrieve image from database, and no need "cut" in the command pipe. For example:

sqlite3 fr.db "select hex(bmp) from reg where id=1" | xxd -r -p > 2.png