What are some common mistakes in data filtering?
Some common mistakes include not defining clear criteria, overlooking null values, and failing to validate the filtered data.
Can you give me an example of overlooking null values?
Sure! If you're filtering a dataset for users over 18 but ignore null ages, you might exclude important data.
How can I avoid these mistakes?
To avoid these mistakes, always define your filtering criteria clearly, check for nulls, and validate your results.
What tools can help with data filtering?
Tools like SQL, Python's Pandas, and Excel can help you filter data effectively and avoid common pitfalls.
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