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Asked: 2026-06-08T14:09:00+00:00

I have a folder structure which I need to store in a database. Each

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I have a folder structure which I need to store in a database. Each folder has a name, a primary key and a foreign key to their parent folder. So a folder can have sub folders.

What I am having trouble with is when a user wants to move up or down or add a new sub folder (adding a sub folder is added at the end of the tree) and I want to record the order of the sub folders.

How do I record the user ordering in a table?

So if I have sub folders B, C and D under A (in that order) and I move D up, then the order is B, D and then C. How do you reflect this in a database?

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1 Answer

  1. Editorial Team

    If you are looking to create a sub-hirarchy you can apply a order by clause with a integer to sort. for example

    ID, ParentID, SortOrder, Name

    Where SortOrder is a integer between 0 and foldercount-1 then just apply a 

    ORDER BY SortOrder ASC

    I would also suggest you add a Lineage and Depth field to your table, that way you can easily traverse up and down the tree a bit quicker without as expensive queries. Have a look at this article.

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