Data analyst – probably the most straightforward job title of all data professionals. There’s not much thinking involved in deciphering what data analysts do. Call me Captain Obvious: data analysts ...

A comprehensive collection of Data Analyst interview notes, SQL, Excel, Python, Statistics, Power BI concepts, business case studies, and commonly asked interview questions. Created as part of my ...

SQL Questions: Identify duplicate records You have a table Orders with columns OrderID, CustomerID, OrderDate, and Amount. Write a query to identify duplicate records based on CustomerID and OrderDate ...