[freeCodeCamp] SQL Group By Tutorial: Count, Sum, Average, and Having Clauses Explained September 24, 2020
[freeCodeCamp] SQL Joins Tutorial: Cross Join, Full Outer Join, Inner Join, Left Join, and Right Join. August 28, 2020
[freeCodeCamp] SQL Operators Tutorial – Bitwise, Comparison, Arithmetic, and Logical Operator Query Examples August 21, 2020
