Aggregate functions in SQL are used to perform calculations on a set of values and return a single result. These functions operate on a group of rows and produce a single value as output. Some common ...

SQL folder for RealPython part 2 course. Contribute to hedonnn/sql development by creating an account on GitHub.

Distinct Medallions = DISTINCTCOUNT('TRIP'[MEDALLIONID]) …I can build a table visual that compares the output of the two measures (as you can see, the difference isn’t that big): …and see that the ...