gistfile1.txt

I use excel to generate product upload files for Google's Merchant Center, Amazon's Seller Central, and in-house e-commerce solutions.
But it's the same type of data (i.e. products), and sometimes even the same data, just being pushed to different targets.
Maintaining these often half-duplicate xlsx files has become tedious and unwieldy, so I'm wondering if I should have a database of products that would allow me to generate a spreadsheet for each target (by performing certain queries on my more general data I'd assume).
Is this a legitimate time to use a database?
And, if so, should I use a relational database? I'm not too clear as to what kind of data is relational and what kind isn't, but I've read that traditionally relational databases are used in the corporate/e-commerce area.
But that could just be history rather than adeptness.
Anyway, just wondering.