Before creating Named functions, make a copy of the spreadsheet you plan to apply it on. Then, type your formula and test it on the data. Make sure the function works and doesn't produce errors.

In this example, Transact-SQL will create a new table with all columns from the rows in "old_table" in which the last name starts with "Ja." ...

Like most databases created in the last couple of decades, SQL Server allows developers to extend the database by creating functions. But prior to the upcoming 2019 release, SQL Server’s support ...