Business Modeling-  IF Functions, Hypothesis Testing

Excel- Logical Functions in Excel

The video is slightly old but the explanation is clear and the concepts apply to the latest Excel versions.

Statistics- Introduction to Hypothesis Tests

Database Management Systems- Subqueries

SQL Subqueries

A query inside a query is called a sub query. Usually entry level data analysts don't write subqueries at work but some jobs might expect you to have a basic understanding of sub queries- so it does not hurt to learn. For advanced analysts, its definitely a useful skill to have.

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