I need to display parent_name in one select query

Question

0.00/5 (No votes)

See more:

this is my table

id   |  Parent_id  |  Category
1    |	0	   | Clothes
2    |	1	   | Women
3    |	2	   | Jewellery
4    |	0	   | Mobiles

What I have tried:

by select query i need to display like below

id   |  Parent_id  |  Category  |  Parent_name
1    |	0	        | Clothes    |  none
2    |	1	        | Women      |  Clothes
3    |	2	        | Jewellery  |  Women
4    |	0	        | Mobiles    |  none

Posted 10-Feb-19 21:22pm

Member 14024377

Updated 10-Feb-19 22:23pm

Add a Solution

Comments

CHill60 11-Feb-19 3:51am

And what query have you tried to create to achieve those results?

The Cool Cat 11-Feb-19 4:22am

Your table is kinda confusing.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Maciej Los · Accepted Answer · 2019-02-10T22:23:00

Check this:

SQL

DECLARE @hierarchy TABLE (id INT IDENTITY(1,1), Parent_id INT, Category NVARCHAR(50))

INSERT INTO @hierarchy (Parent_id, Category)
VALUES(0, 'Clothes'),
(1, 'Women'),
(2, 'Jewellery'),
(0, 'Mobiles')


SELECT a.id, a.Parent_id, a.Category, ISNULL(b.Category, 'none') As Parent_Name
FROM @hierarchy AS a LEFT JOIN @hierarchy AS b ON a.Parent_id = b.id

I'd strongly recommend to read this: Visual Representation of SQL Joins[^]