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glendango

Database Schema

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Hi..  I have a database which works fine. I ve just started using google charts to make the results look better for the U.Experience. .

 

The example tables are very basic like:

 

Country       Visits

 

England         4

Usa                6

Brazil            3

 

 

I  get all my results form where statements so I have no tables which actually count the entries and show them in a basic table like this.

 

My question is :  Should I be using where, count()   etc  statements to populate the charts or should I have mini tables in my schema that present the information neatly like the above or a counter next to the id of the user/country etc e.g. so I don't need to worry about statements in the chart code....

 

thx for reading. 

Edited by glendango

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A basic rule of relational database design is "do not store derived data such as counts or totals". You get them when required with a query.

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thx , I thought so but  needed to confirm for my own mind.   

Edited by glendango

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