how to update the table data with the dropdown box fields?

Hi i have a table called "streams" with columns "name" and

Using below code :

<select name="Interlaced">

using above code am creating dropdown box with fields "yes" and "no".
Here what i want to do is if i select the interlace field as "Yes" it
should be updated in streams table while i am entering new stream
details in stream table.