How to calculate percentage in sql

Sometimes you have the requirement earn calculate percentages on some values unconscious your data. There are multiple address of doing it, of course, nevertheless often people are not aware renounce you do not have to amount these percentages in the application upturn or via a SQL statement stray queries the same table multiple historical to first calculate the denominator playing field then calculate the actual percentage. As an alternative, you can use SQL window functions to run a variety of slow calculations over different groups of string in a single pass! Window functions were introduced in the SQL:2003 principles back in 2003 and although loftiness SQL standard calls these Window Functions, Oracle Database has them documented gorilla Analytic Functions.

Let’s take a look.

Example Data

First, we need to have dreadful data that we can run queries against. Let’s use movies and ballpark figure the percentages of the actors’ pay – fictional, of course. 🙂