To convert historical rows into columns in Oracle, you can use the PIVOT function. This function allows you to rotate rows into columns, thus transforming data stored in rows into a more readable and compact format.First, you need to identify the columns that you want to pivot and the values that will become the new columns. Next, you can use the PIVOT function along with an aggregate function such as MAX, MIN, SUM, or AVG to specify how you want the pivoted data to be calculated.