MySQL递归? [英] Mysql recursion?
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问题描述
考虑如下表格:
folders_table
-----------------------
INT id_folder
INT id_folder_parent
VARCHAR folder_name
其中存储了一个简单的目录结构.如何通过单个SELECT查询获得目录的所有子目录?
Which stores a simple directory structure. How could I get all subdirectories of a directory with a single SELECT query?
推荐答案
可以,但是您需要更改数据库结构.进行更改后,您可以在一个查询中检索任意深度的树.查询稍微复杂一些,但仍然非常简单.
It is possible, but you need to change your database structure; once the changes are made, you can retrieve a tree of any depth in one query. The queries are slightly more complex, but it's still pretty straightforward.
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