Statistics- Descriptive Stats
Quick Introduction to Descriptive Statistics
Descriptive statistics are used to summarize and describe data. Mean, median, mode are examples of descriptive statistics.
Excel- True or False
Functions that return either TRUE or FALSE are called logical functions. These are pretty commonly used in excel.
Basic summary Statistics in Excel
SQL- Introduction to 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.