Functions are predefined in SQL and you use them to perform operations on data. They let you do things like aggregating data, formatting strings, extracting dates, and so on.

Use aggregate functions for comparison In addition to using subselects to examine data in related tables, it’s also possible to use an aggregate function in a WHERE clause subselect to make a ...

Anatomy of an Excel formula: Using functions to perform calculations Your email has been sent If you’re fairly new to Microsoft Excel, you’ve probably learned to enter data into cells to ...

IBM's SQL didn't have a vast library of supporting functions for Oracle to copy in 1979. So if "language copying" is okay but "API copying" is not, then Oracle arguably did nothing wrong under ...