Delete from joined MySQL tables

When you need to delete rows from a table, and the delete conditions require a joined table, MySQL needs to know which table you want to delete from.

Let's say that Post belongs_to :author. In order to delete all posts from the author named "Eric", write

DELETE posts FROM posts LEFT JOIN authors ON posts.author_id = authors.id WHERE authors.name = 'Eric'

Notice the additional "posts" between DELETE and FROM.