But when I want to use this photo data in Novacura variables it shows, that is empty. Only filename is available. Even when I check photo data variable type, It shows NULL. It looks like order_photo data is missing
What Zoltan says. And, optionally, you can also convert it while storing it in the database (Insert into table (column) select convert(varbinary(max),value1.data)
If you do it Zoltans way you can display it in the file gallery.
If you want only to save it to an MS SQL database, you can convert it to binary by using convert,varbinary(max) - that is an MS SQL command to convert it to binary.