[Year 12 SofDev] ER diagrams v data structure diagrams for 2011

[Alex Galle]

Hi All

Going back into a past life an ER diagram was simply created to establish
the entities and relationships that exist in what would become a relational
database. No detail was required with respect to each entity other than a
name. The DSD on the other hand identified all of the fields within each
entity, the key field/fields. The relationships were indentified as being
one to one, one to many etc ensuring that the model created was indeed
relational and that a working RDB could be created.

I will go through my old resources to see if what I used is still available.
If successful I will pass the details on to the list.

Regards

Alex Galle

 

From: sofdev-bounces at edulists.com.au [mailto:sofdev-bounces at edulists.com.au]
On Behalf Of Margaret Iaquinto
Sent: Thursday, 4 November 2010 11:39 AM
To: sofdev at edulists.com.au
Subject: [Year 12 SofDev] ER diagrams v data structure diagrams for 2011

 

In the study design for 2011, a KK includes data structure diagrams and ER
diagrams. Looking on the Web for some help, it appears they are similar and
perform similar functions. Perhaps the ER diagram is a subset of the data
structure diagram. Haven't fully grasped this yet.

 

ER diagrams are found in ITA in 2011.

 

So, can someone supply a way to differentiate the two? Or even websites for
examples?

 

thanks

 

Maggie

 

 

Margaret Iaquinto

Information Technology Coordinator

 

St Leonard's College

Brighton Campus

t (+61 3) 9909 9300

 

x 529

 

www.stleonards.vic.edu.au <http://www.stleonards.vic.edu.au/> 

 



 

 

Alternate email: maggie at iaquinto.net


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