Working with Data 111 You won't be able to upload all the right information all the time, and sometimes EP may get confused by various character sequences in your data. If this is the case, then you can easily make the changes you need using the administration tool. After all, you have pretty much uploaded the vast majority of the data to your site. If you have to spend some time tweaking the results, then it is no big deal. Remember that it is far more efficient to modify your data in Excel or something similar rather than the administration tool because you don't have to wait for the page to reload each time you click a button. For example, if you have a non-osCommerce database containing your products' names and prices, but not everything else you need such as the products' descriptions, then you will end up having to add data manually through the admin tool unless you first add it in Excel or something similar. Summary Designing and implementing your product data structure is one of the most vital jobs involved in setting up your osCommerce store and hopefully you now find it quite easy. Consequently, you should feel pretty relaxed at this stage because you have almost all your data related needs sorted out, or at the very least, understand exactly how to deal with your data. From this chapter, you have learned that categorizing your products and setting their attributes is not quite as straightforward as it may seem on the surface. Provided you think before you act, you will be just fine with regards to these and many other concepts. Of course, dealing with data can be fairly tricky even if you have a good structure, and we have seen how osCommerce helps us handle data updates and changes by giving us various options such as linking or duplicating, or warning us if we are trying to delete something with dependencies.