【每日SQL打卡】​​​​​​​​​​​​​​​DAY 17丨文章浏览 I【难度简单】​

SELECT viewer_id AS ID
  FROM Views
 WHERE viewer_id = author_id
 GROUP BY viewer_id

 

小兄弟,这里是提问区哦,在首页右上角=》创作=》写文章,即可发布自己的文章,祝你好运!