Inserting data into a junction table
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This is my current table design
![enter image description here][1]


  [1]: http://i.stack.imgur.com/sjmhr.png

I have a many to many relationship.

For example I created / inserted an entry to the musicians table how do I actually pass its primary key (id) that is generated from it and immediately insert it to field  musician_id from musician_x_instrument table?