i am a student. i want to as a question can we put the exe file of a java file or other language program in the relational database table column. if we can put it then how we can put it in the column.

I've never had to do it. Images, yes, but never an executable. You'll need to use a Varbinary(MAX) datatype and you can read them in and out just like with any other varbinary. A far better and safer approach would involve just storing the filename, but you have the attendant problem of having to copy the directories when you deploy the database.