The product table already included categories for each product. A key issue: how to make the database “know” that the products in one table map to the product names in another table — especially when ...

There are many popular, low-cost ways to toss text onto the Web, from blogs and Google Docs to social networking sites. Likewise, you can find a lot of sites where you can post photos and videos. But ...

Tracking change activity over time requires complicating what might otherwise be simple data structures. One approach that many like to employ involves simply adding a start or effective date onto a ...