[De.camm]

I tried to make a query to call the both table refer to the same column as reference key, but my problem is how to
add the value checkbox into the other table.

My story is, there are two table, table "A" store a file details, and table "B" store letter details.
Now i try to make a efiling system that the available letters that not file yet at any file can be select by check box, and the id number for file "A" will be store at table "B" as a reference that the letter filing at which file.

anybody can give me an idea to connect the checkbox value to file "B"?