"Welcome to Day 17 of our '15 Days of SQL' Masterclass! In today's video, we dive into Advanced SQL Window Functions that are crucial for analyzing financial or time-series data. You will learn about:
The LAG() and LEAD() functions to access data from previous or next rows.
How to use FIRST_VALUE() and LAST_VALUE() to retrieve the first and last values within a partition.
Ranking rows with functions like ROW_NUMBER, RANK, and DENSE_RANK.
We also cover practical examples, like calculating salary differences and finding trends in employee data. Whether you’re working with financial data or hierarchical datasets, these techniques will help you write efficient SQL queries. Don't forget to follow along with the hands-on examples and SQL code in the description!"
Additional Description:
"This video is perfect for SQL developers and analysts looking to deepen their understanding of window functions. By the end of the session, you will be able to write powerful SQL queries to perform advanced analysis on your data.
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24 сен 2024
