If you’re an aspiring data scientist but still processing your data in Excel, you might want to upgrade your toolset. Why? Firstly, while advanced features like Excel Pivot tables can do a lot, they don’t offer nearly the flexibility, control, and power of tools like SQL, or their functional equivalents in Python (Pandas) or R (Dataframes). Also, Excel has low size limits, making it suitable for “small data”, not “big data.”