MySQL update a joined table

Question

I want to update a table in a statement that has several joins. While I know the order of joins doesn\'t really matter (unless you you are using optimizer hints) I ordered

Answer 1

This link should give you the syntax that MySQL needs and here is an example. Why do you need to join the two tables? is it to limit the records updated? I am asking because you can also do something like the following:

update B set B.x=
    where 
B. is in(
    select A.y 
      from A left outer join B on A.=B.
)