A customer in Bucharest had been waiting eleven days for a package that the system said was "delivered." The operations manager pulled up the data to investigate and that's when the real problem revealed itself. It wasn't just this one shipment. The entire dataset was unreliable.
I have over 400+ videos on Data Analytics - that's too many for one person to watch.
Here are the top 5 that I would watch:
1. How to Become a Data Analyst - https://t.co/Jc5LoNCUaj
2. Complete FREE Data Analyst Bootcamp - https://t.co/2SjI9iVxr5
3. Learn Power BI in Under 3 Hours - https://t.co/CqE1ZqKUdC
4. Top 5 Reasons NOT to Become a Data Analyst - https://t.co/AYutUC6HkH
5. Learn SQL in 4 Hours - https://t.co/MTnjvTF7zw
Some of these videos are ones I made over 5 years ago, but they still hold true today.
If you have 2 minutes to solve an SQL question, can you?
And the question is, find the second highest salary in each depart from the employees table, excluding any department with fewer than 2 employees