Click here to monitor SSC
SQLServerCentral is supported by Red Gate Software Ltd.
 
Log in  ::  Register  ::  Not logged in
 
 
 
        
Home       Members    Calendar    Who's On


Add to briefcase

How join two tables? Hierarchical table Expand / Collapse
Author
Message
Posted Saturday, November 30, 2013 1:51 AM
Forum Newbie

Forum NewbieForum NewbieForum NewbieForum NewbieForum NewbieForum NewbieForum NewbieForum Newbie

Group: General Forum Members
Last Login: Monday, December 2, 2013 6:43 AM
Points: 1, 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

Post #1518636
Posted Saturday, November 30, 2013 2:43 PM


SSC-Dedicated

SSC-DedicatedSSC-DedicatedSSC-DedicatedSSC-DedicatedSSC-DedicatedSSC-DedicatedSSC-DedicatedSSC-DedicatedSSC-DedicatedSSC-DedicatedSSC-DedicatedSSC-DedicatedSSC-Dedicated

Group: General Forum Members
Last Login: Today @ 6:34 PM
Points: 35,534, Visits: 32,117
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."

(play on words) "Just because you CAN do something in T-SQL, doesn't mean you SHOULDN'T." --22 Aug 2013

Helpful Links:
How to post code problems
How to post performance problems
Post #1518664
« Prev Topic | Next Topic »

Add to briefcase

Permissions Expand / Collapse