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10.03.2008 at 12:51AM PDT, ID: 23784220
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9.0

How do I design a table with dynamically increasing number of columns?

Asked by jericotolentino in MySQL Server

Tags: ,

Dear experts,

I have to implement a system that uses several types of fees (tuition, laboratory, books, and others). As of now there are 10 different types, but in the future, they will diversify and increase. There are currently two approaches in my mind:

1. Just keep adding columns to the table
2. Create one table that maps one fee type to an amount and the person who paid for it

The first approach doesn't look scalable, while the second will result in a table with millions of rows. Another suggestion I got was to have a text field and put the fee types and fee amount in an array. While it would be fine for just simple querying (e.g., Customer 4 paid $50 on October 2, 2008), it might be rather cumbersome when it comes to queries done by business intelligence applications.

What do you think?

Thanks.Start Free Trial
[+][-]10.03.2008 at 12:58AM PDT, ID: 22631890

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[+][-]10.03.2008 at 01:00AM PDT, ID: 22631905

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[+][-]10.03.2008 at 01:07AM PDT, ID: 22631944

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[+][-]10.03.2008 at 01:23AM PDT, ID: 22632004

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About this solution

Zone: MySQL Server
Tags: mysql, table design
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Solution Provided By: GO-87
Participating Experts: 1
Solution Grade: A
 
 
 
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