create_table "posts", :force => true do |t|
 t.string   "title"
 t.string   "slug"
 t.string   "link"
 t.datetime "pubdate"
 t.text     "description"
 t.integer  "blog_id"
end

delete from posts where pubdate <=
  (select pubdate from posts order by pubdate desc limit 1 offset 5000)