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Re: Tree structure [message #7564 is a reply to message #7563]

Thu, 14 January 2021 05:09

AJM
Messages: 2367
Registered: April 2006
Location: Surrey, UK

Senior Member

It is always a good idea to draw the hierarchy structure on a piece of paper first so that you can draw the lines of connectivity between each element in that structure so that you can see for each node which is its parent and which are its children. You may also need to identify where connectivity is invalid so must be prevented. In my TREE structure each node can have only one parent (or no parent for the top node) but any number of children. Does the same rule apply in your structure.

Once you have drawn a structure which identifies and follows all the rules it will be easier to map that structure to tables in the database, and if the structure is right the coding will be (relatively) easy.

Tony Marston
http://www.tonymarston.net
http://www.radicore.org

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[Message index]

		Tree structure By: htManager on Sat, 05 July 2014 06:17
		Re: Tree structure By: AJM on Sun, 06 July 2014 04:40
		Re: Tree structure By: htManager on Mon, 07 July 2014 05:52
		Re: Tree structure By: htManager on Wed, 11 February 2015 11:05
		Re: Tree structure By: AJM on Thu, 12 February 2015 04:34
		Re: Tree structure By: htManager on Thu, 12 February 2015 08:31
		Re: Tree structure By: AJM on Fri, 13 February 2015 05:10
		Re: Tree structure By: htManager on Thu, 26 February 2015 09:12
		Re: Tree structure By: AJM on Sat, 28 February 2015 06:20
		Re: Tree structure By: htManager on Sat, 28 February 2015 08:31
		Re: Tree structure By: AJM on Sun, 01 March 2015 04:23
		Re: Tree structure By: htManager on Mon, 02 March 2015 04:44
		Re: Tree structure By: htManager on Thu, 23 April 2015 11:49
		Re: Tree structure By: AJM on Fri, 24 April 2015 04:07
		Re: Tree structure By: htManager on Mon, 04 May 2015 11:48
		Re: Tree structure By: AJM on Tue, 05 May 2015 04:30
		Re: Tree structure By: htManager on Mon, 01 June 2015 11:32
		Re: Tree structure By: AJM on Tue, 02 June 2015 05:12
		Re: Tree structure By: htManager on Tue, 02 June 2015 10:46
		Re: Tree structure By: AJM on Tue, 02 June 2015 13:05
		Re: Tree structure By: htManager on Mon, 11 January 2021 12:54
		Re: Tree structure By: AJM on Mon, 11 January 2021 13:50
		Re: Tree structure By: htManager on Mon, 11 January 2021 15:47
		Re: Tree structure By: htManager on Wed, 13 January 2021 04:10
		Re: Tree structure By: AJM on Wed, 13 January 2021 05:25
		Re: Tree structure By: htManager on Wed, 13 January 2021 06:13
		Re: Tree structure By: AJM on Thu, 14 January 2021 05:09
		Re: Tree structure By: htManager on Sat, 16 January 2021 03:43
		Re: Tree structure By: AJM on Sat, 16 January 2021 05:06
		Re: Tree structure By: htManager on Sun, 24 January 2021 14:57

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