Solved

N-Level Quiries (Hierarchical Retrieval)

Posted on 2001-06-23
4
208 Views
Last Modified: 2007-12-19
I wanted to know, how can I do a tree query on a table, which allows me to retrieve the entire tree structure or sub-tree structure using one query. For example if I wanted to list all data from the root to all the nodes (having id and parentid as the identifier in the table). As I understand Oracle has the features of "Connect BY PRIOR and START WITH" to allow me to do this, but what can I use in Access.

Thanks
0
Comment
Question by:denz_1
  • 2
4 Comments
 
LVL 7

Accepted Solution

by:
Nosterdamus earned 100 total points
ID: 6224211
Hi denz_1,

As far as I know, there isn't a stright-forward solution for this in access.

You might need to write your own code to achive what you want.

You'd probably need to create two new queries (or tables):
1. For the parents.
2. For the nodes.

Notice that a node can be a parent. In the case, it should show on both queries (tables).

If you need more help on this, please provide some more information about the structure of your tree, and what are the relationships within the tree.

HTH,

Nosterdamus
0
 
LVL 11

Expert Comment

by:joekendall
ID: 6517590
denz_1:

Did you receive an adequate answer? If not, please post again. If there is no answer, then you might want to have the question deleted and points refunded by contacting Customer Support.

Thanks!

Joe
0
 

Expert Comment

by:amp072397
ID: 6742597
denz_1 hasn't logged in since late September. Points will be awarded to Nost' unless they return now with a viable objection.

thanks!
amp
community support moderator
0
 

Expert Comment

by:amp072397
ID: 6783001
Points to Nost'.

amp
community support moderator
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

It took me quite some time to sort out all the different properties of combo and list boxes available from Visual Basic at run-time. Not that the documentation is lacking: the help pages are quite thorough and well written. The problem was rather wh…
Introduction When developing Access applications, often we need to know whether an object exists.  This article presents a quick and reliable routine to determine if an object exists without that object being opened. If you wanted to inspect/ite…
Basics of query design. Shows you how to construct a simple query by adding tables, perform joins, defining output columns, perform sorting, and apply criteria.
In Microsoft Access, learn how to “cascade” or have the displayed data of one combo control depend upon what’s entered in another. Base the dependent combo on a query for its row source: Add a reference to the first combo on the form as criteria i…

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

24 Experts available now in Live!

Get 1:1 Help Now