title: mysql: export single row, but with all dependencies
body: <p>Mysql question.
  I want to export one single row from one table with a catch: I want to pull together with it all the rows in all other tables referenced from the initial row by foreign keys - and referenced from the new rows too, recursively, until I get all rows that the initial one "needs to exist".</p>
  
  <p>How can I do that?</p>