SQList stores documents an images as VARBINARY(MAX) data in the SQL tables.
To use these data to, for example, serve the document via a web page or store it as as file, here is how to do it using C#.
This is the data in the SQL table (it's a jpeg):
This is the C# code that reads the binary data and save it as a file, as well as renders it as a web image:
The image stored as a file:
This is the image in a browser: