Window functions are a powerful tool in Oracle SQL that allows you to perform calculations over a set of rows, often referred to as a window.They enable you to analyze data in a more granular and flexible way than traditional aggregate functions.Some commonly used window functions in Oracle SQL include ROW_NUMBER, RANK, DENSE_RANK, LEAD and LAG, FIRST_VALUE and LAST_VALUE, and NTILE.By mastering Oracle SQL window functions, you can unlock new insights from your data and gain a competitive edge in data analysis.