The Art of the Advanced Script: Best Practices for Building a Powerful SQL Library

1. Defining "Difficult": What constitutes a "difficult" script can be subjective. It may involve:

   • Complex logic: Scripts with nested queries, window functions, or advanced joins can be challenging for beginners. (e.g., Finding the top 10 customers with the highest average order value in the last year might require advanced window functions like RANK() or DENSE_RANK())
   • Unfamiliar functionalities: Scripts utilizing lesser-known features like Common Table Expressions (CTEs), triggers, or stored procedures can be daunting for those new to these concepts. (e.g., A script that automatically updates inventory levels upon order placement might involve triggers)
   • Database-specific features: Scripts relying on vendor-specific functionalities might not be portable across different database platforms. (e.g., Using TEMPDAB tables in Microsoft SQL Server would require adjustments for other platforms)