You can build a reputation as an expert spreadsheet developer. This certainly doesn't hurt the resume. Using Excelville.com to sell spreadsheets allows you to set up a profile with your work, biography, and other info that certainly makes for good conversation material during interviews.
Early databases available for the PC market were simple two-dimensional solutions and were essentially designed as a record-keeping system. However, when computing power increased, the advent of the relational database became an affordable option. Applying the rules proposed by Edgar Codd, the Database Management System (DBMS) became a reality, with products such as dBase being widely implemented in the desktop market.
Elaborate, properly constructed spreadsheets greatly simplify a wide range of activities and processes within companies, enabling business owners to economize valuable time and effort, increase the efficiency of their business (Analysis), keep track of different tasks, manage their budget, optimize the planning of future events (Forecasting), organize and access valuable information, and optimize the completion of specific tasks. And thus, thanks to their many benefits, spreadsheet programs have come to be considered indispensable tools for businesses in today's competitive climate.
You'll need to include more than a basic level of development and calculation in your spreadsheet. There are lots of free spreadsheets on the web. Most of which are very simple and easy to build. People aren't going to buy a spreadsheet that they can get for free. Take yours to the next level by adding all the value you can imagine. Then research on how you can offer a little bit more on the development and functionality side.
what is a spreadsheet used for
examples of spreadsheet packages
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