Chapter 13. Functions and Stored Procedures: Reusable Code
Don’t lose it, reuse it. Retyping roughly the same code over and over gets old fast and feels like needless waste. If you’re ready to embrace a sustainable mindset, this chapter shows you how to save your SQL commands and reuse them later. Functions give you a shortcut to perform a set of stored calculations on brand new inputs. They return computed results, which you can even SELECT as a new column of values. How eco-chic! But as amazing as functions are, they aren’t a cure-all. To modify table data or do other complex actions, you’ll need to write your own stored procedure instead. These parameters and variables aren’t going to upcycle themselves, so turn the page to get started.
Repeating yourself...
As fun as it is to write SQL code, you may grow tired of writing nearly the same SQL code over and over again with small modifications. Abby appears to have hit this problem in full force when looking for places with varying weather conditions.
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