单字答案是肯定的.

照片:
* photo_id(PK)
*文件路径

评论:
* comment_id(PK)
*身体

comment_to_post
* comment_id(PK)-> FK到comment.comment_id
* post_id(PK)-> FK到post.post_id

阅读此 http://msdn.microsoft.com/en-us/library/ms179610.aspx

Single word answer is Yes.

photo:
* photo_id (PK)
* filepath

comment:
* comment_id (PK)
* body

comment_to_post
* comment_id (PK) -> FK to comment.comment_id
* post_id (PK) -> FK to post.post_id

Read this http://msdn.microsoft.com/en-us/library/ms179610.aspx