SQL Tutorial - PIVOT

SQL PIVOTS Made Easy (Rows to Columns)

Pivoting Data with SQL

MySQL||How to ADD/DROP Multiple Columns using Single ALTER Statement?

How to Select 3 Columns and Drop Duplicates in SQL

How to Remove Duplicates from Multiple Columns in SQL with a WHERE Clause

Unpivoting Data with SQL

SQL Tutorial - UNPIVOT

SQL: Pivot and Unpivot Data in SQL Server Database Including Multiple Columns - A Step-By-Step Guide