Dynamic Fields/Columns

Posted by DanMark on Programmers See other posts from Programmers or by DanMark
Published on 2012-07-09T17:56:01Z Indexed on 2012/07/09 21:22 UTC
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programming-practices

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mysql

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nosql

What is the best way to allow for dynamic fields/database columns? For example, let's say we have a payroll system that allows a user to create unique salary structures for each employee. How could/should one handle this scenario? I thought of using a "salary" table that hold the salary component fields and joining these columns to a "salary_values" table that hold the actual values. Does this make sense?

Example Salary Structures:

Notice how the components of the salary can be shared or unique.

-- Jon's Salary --

Basic           100   
Annual Bonus    25   
Tel. Allowances 15

-- Jane's Salary --

Basic             100
Travel Allowances 10
Bi-annual Bonus   30

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