Udemy – EssentialSQL – SQL Window Functions for Business Analytics

Udemy – EssentialSQL – SQL Window Functions for Business Analytics
English | Tutorial | Size: 1.25 GB

SQL Window Functions for SQL Server, MySQL, SQLite & PostgreSQL, for Data Analysis, Business Analytics and Intelligence

In this Course you will Learn to:

Write simpler queries using window functions.

Know how window functions work with partition and other clauses to help you form running totals or compare values from one row to the next.

Create complex queries involving joins using window functions.

Learn how to use LEAD and LAG to avoid using cursors in your SQL scripts.

Write window functions using MySQL, PostgreSQL, SQLite, or SQL Server – your choice! I’m sure they will work with Oracle, I just haven’t tested… 🙂

Understand how to set up a window frame and their affect on the window function.

Know the difference between window functions and classing GROUP BY results.

Work with multiple window functions within a query.

Who to use results from a window functions within the same query.

Learn to us the three classes of functions: Aggregate, Ranking, and Analytic functions.

Nothing is worse than

Being excited to learn something new but not knowing where to start.

Wasting time learning the wrong features.

You being overwhelmed with options and not knowing which to use.

Imagine Having…

Knowledge – Knowing how to quickly use window functions to take your SQL to the next level.

Confidence – Feeling good that you’re on the right track.

Accomplishment – Having a sense of accomplishment that you’ve learned something most cannot.

By the time you’ve completed this course you’ll have an appreciation of window functions, overcome your fear, and able to use them to simplify some of your very complex queries.

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