我有三个 MySQL 表——照片、标签和标签照片——以及照片和标签之间的 m:n 关系。
Photos: id | filename | ...
Tags: id | name
Tagsphotos: photo | tag
我想选择所有具有这种条件的照片:
(tagged as "dirty" AND tagged as "road") AND (tagged as "light.front" OR tagged as "light.side") AND (tagged as "perspective.two-point")
...这意味着我想找到所有带有脏路的照片,采用两点透视法,无论是侧光还是前光。
我该怎么做?谢谢。