For example, a function that checks whether a given date is a holiday. SQL functions allow you to encapsulate ... instead of writing the same code over and over again, we create the function.

Window Functions: Advanced analytics with OVER(), PARTITION BY ... This project serves as a hands-on learning experience, with practical examples and exercises designed to deepen understanding of SQL ...

SQL (Structured Query Language) has been with us for more than half a century and it’s not going away anytime soon. Popular in both traditional relational databases and newer NoSQL databases ...