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Tag: hierarchical-data

MySQL – Recursively list all parents and ancestors of all items in table

I have a table with a parent/child hierarchy that supports multiple (theoretically infinite) levels of nesting: I am trying to build a query that produces a concatenated list of every item’s parent items up until the highest parent in the tree: Based on a number of other answers here I have constructed the following MySQL query: See Fiddle here: http://sqlfiddle.com/#!9/48d276f/902/0

Sql Database design hierarchy

I have been tasked to create an app to track our contracts. I am planing to use Django and PostgreSQL. Our existing data is in Excel with 52 rows. I have found an hierarchy pattern in the file which contains as below Holding Office Registered Office Operating Office For example – Holding office (company) can contain one more Registered Office

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