I have an application that reads an image file and puts it into a MEDIUMBLOB. Or at least that's what it's supposed to do. What it actually does is nothing. I can do the database insert, which ...

Click the database you want to use to insert data. Type the MySQL insert statement that inserts the characters, placing a backslash in front of any commas or quotes.

There are plenty of GUI tools available that can manage your MySQL database, even from the Windows environment.