Contents
How to recursively get all parents from a given ID?
WITH RECURSIVE cte_department AS ( SELECT d1.id, d1.name, d1.father FROM department d1 WHERE d1.id=6 UNION ALL SELECT d2.id, d2.name, d2.father FROM department d2 INNER JOIN cte_department cte ON cte.id = d2.father ) SELECT * FROM cte_department;
How to create a hierarchical query in MySQL?
Since this query will come after the ancestry one, we can use accumulated value of @cl (which we used to calculate level in the previous query) as a seed. To do that, we can take the level returned by the descendancy tree query, and just add @cl to it.
When do I expect a result in MySQL?
The result i was expecting, when filtering the data, where id=1, it will generate the result i’m expecting. or this is the illustration. i’ve been looking everywhere, and reading this http://mikehillyer.com/articles/managing-hierarchical-data-in-mysql/, but i didn’t find the result i was looking for..
Can a ID have more than one parent?
An id can have only one parent, that’s why we can employ a linked list technique to build an ancestry chain, like shown in this article: ? To combine two queries, we can employ a simple UNION ALL.
How to get all child records given a Parent ID?
So for the above example I’d like to be able to pass in a value of 1 and get all the records above. So far, I’ve come up with the following recursive table-valued-function but it’s not behaving as expected (only returning the first record). CREATE FUNCTION [dbo].
How to retrieve all recursive children of parent row in Oracle SQL?
How to retrieve all recursive children of parent row in Oracle SQL? I’ve got a recursive query that’s really stretching the limits of this Java monkey’s SQL knowledge. Now that it’s finally 1:30 in the AM, it’s probably time to start looking for some help. This is one of the few times Google has failed me.
Which is an example of a parent child query?
Common Table Expression (CTE) feature of SQL Server (introduced in SQL Server 2005). Common examples of multiple levels of nested parent child query are … getting parent branches of selected employee, navigate through org chart hierarchy using sql, navigate through product hierarchy using t-sql