SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


How join two tables? Hierarchical table


How join two tables? Hierarchical table

Author
Message
mesteruh
mesteruh
Forum Newbie
Forum Newbie (5 reputation)Forum Newbie (5 reputation)Forum Newbie (5 reputation)Forum Newbie (5 reputation)Forum Newbie (5 reputation)Forum Newbie (5 reputation)Forum Newbie (5 reputation)Forum Newbie (5 reputation)

Group: General Forum Members
Points: 5 Visits: 9
I have two table. Department is hierarchical table.

Department
--- id (int primary key)
--- name (varchar)
--- parent (int)

Users
--- Id
--- name
--- department_id

This query return all data from departments. But i cannot understand how get data from users

SELECT t1.name AS lvl1, t2.name as lvl2, t3.name as lvl3
FROM Department AS t1
LEFT JOIN Department AS t2 ON t2.parent = t1.id
LEFT JOIN Department AS t3 ON t3.parent = t2.id


Jeff Moden
Jeff Moden
SSC Guru
SSC Guru (217K reputation)SSC Guru (217K reputation)SSC Guru (217K reputation)SSC Guru (217K reputation)SSC Guru (217K reputation)SSC Guru (217K reputation)SSC Guru (217K reputation)SSC Guru (217K reputation)

Group: General Forum Members
Points: 217729 Visits: 41995
mesteruh (11/30/2013)
I have two table. Department is hierarchical table.

Department
--- id (int primary key)
--- name (varchar)
--- parent (int)

Users
--- Id
--- name
--- department_id

This query return all data from departments. But i cannot understand how get data from users

SELECT t1.name AS lvl1, t2.name as lvl2, t3.name as lvl3
FROM Department AS t1
LEFT JOIN Department AS t2 ON t2.parent = t1.id
LEFT JOIN Department AS t3 ON t3.parent = t2.id



90% of the solution is the correct identification of the problem. What do you want the output to look like and how do you want it grouped?

My recommendation is to provide some data in a readily consumable format. Please don't assume how to do that. Please see the first link in my signature line below under "Helpful Links". Once you have that data, then provide an example of how you want that data to look.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search