How to Query nested rows in a table to return all row (or any of there nested children or nested parents) which meets a condition?

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SQL-Server-2012

I have a table with ID column, ParentID column which refer to a parent row in the same table and an IsFavorite column with a true or false value.

I need a query to return all rows which has IsFavorite = True or any of there nested parents rows or any of there nested children has IsFavorite = True?

Note:
There is no limit for nested levels.... may be three or five levels or more.

Thanks Guys :)

Posted 6-Oct-15 2:35am

EiadXP

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Member 12003400 · Answer 1 · 2015-10-06T02:54:00

Solution 2

This is called recursive parent child relationship.
Refer given link
1: link
2: link

Posted 6-Oct-15 2:54am

Member 12003400

Naveen.Sanagasetti · Answer 2 · 2015-10-06T02:49:00

Solution 1

What type of issue are you facing now.? As per your requirement you need not worry about parentId and Id the main requirement is filter based on IsFavorite column obviously it should return the parent and child information.

EX:

SQL

select * from tablename
where IsFavorite= true

If this is not your expecting then please elaborate your requirement with some sample data.

Posted 6-Oct-15 2:49am

Naveen.Sanagasetti

Updated 6-Oct-15 2:56am

v2

Comments

EiadXP 6-Oct-15 9:01am

Thanks for your quick response.
Your query will return only favorites row, but i want to get also all its nested children to the last level and all its parents until the root one.

Naveen.Sanagasetti 6-Oct-15 9:17am

Refer below sample

declare @tab table
(
Id int,
ParentId int,
IsFavorite bit
)

insert into @tab
values (1,null,1),(2,1,1),(3,1,1),(4,2,1),(5,1,1),(6,2,0)

select a.id as Parent, b.id as child
from @tab a,
@tab b
where a.Id=b.ParentId
and a.IsFavorite=1