issue_comments: 1462962682
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| html_url | issue_url | id | node_id | user | created_at | updated_at | author_association | body | reactions | issue | performed_via_github_app |
|---|---|---|---|---|---|---|---|---|---|---|---|
| https://github.com/dogsheep/apple-notes-to-sqlite/issues/11#issuecomment-1462962682 | https://api.github.com/repos/dogsheep/apple-notes-to-sqlite/issues/11 | 1462962682 | IC_kwDOJHON9s5XMwn6 | 9599 | 2023-03-09T23:20:35Z | 2023-03-09T23:22:41Z | MEMBER | Here's a query that returns all notes in folder 1, including notes in descendant folders: ```sql with recursive nested_folders(folder_id, descendant_folder_id) as ( -- base case: select all immediate children of the root folder select id, id from folders where parent is null union all -- recursive case: select all children of the previous level of nested folders select nf.folder_id, f.id from nested_folders nf join folders f on nf.descendant_folder_id = f.parent ) -- Find notes within all descendants of folder 1 select * from notes where folder in ( select descendant_folder_id from nested_folders where folder_id = 1 ); ``` With assistance from ChatGPT. Prompts were: ``` SQLite schema: CREATE TABLE [folders] ( [id] INTEGER PRIMARY KEY, [long_id] TEXT, [name] TEXT, [parent] INTEGER, FOREIGN KEY([parent]) REFERENCES [folders]([id]) ); Write a recursive CTE that returns the following: folder_id | descendant_folder_id With a row for every nested child of every folder - so the top level folder has lots of rows ``` Then I tweaked it a bit, then ran this: ``` WITH RECURSIVE nested_folders(folder_id, descendant_folder_id) AS ( -- base case: select all immediate children of the root folder SELECT id, id FROM folders WHERE parent IS NULL UNION ALL -- recursive case: select all children of the previous level of nested folders SELECT nf.folder_id, f.id FROM nested_folders nf JOIN folders f ON nf.descendant_folder_id = f.parent ) -- select all rows from the recursive CTE SELECT * from notes where folder in (select descendant_folder_id FROM nested_folders where folder_id = 1) Convert all SQL keywords to lower case, and re-indent ``` | {"total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0} | 1618130434 |