Calculate Monthly Sales from YTD Sales Using SQL | LAG Window Function

In this SQL problem-solving session, we demonstrate how to calculate monthly sales from Year-To-Date (YTD) sales using the LAG() window function. This technique helps in deriving monthly revenue trends from cumulative sales data. This video is perfect for data analysts, SQL learners, and finance professionals looking to enhance their SQL skills for time-series and financial data analysis. 📌 Topics Covered: ✔ Understanding YTD (Year-To-Date) Sales ✔ Using the LAG() function for calculating monthly sales ✔ Applying window functions for financial and business reporting 📌 Table creation & insertion script: CREATE TABLE sales ( month VARCHAR(50), ytd_sales INT, monthnum INT ); INSERT INTO sales VALUES ('jan', 15, 1), ('feb', 22, 2), ('mar', 35, 3), ('apr', 45, 4), ('may', 60, 5); 🎬 Master SQL window functions to analyze financial data effectively! #sql #windowsfunctions #lagfunction #financialanalysis #ytdsales #monthlysales