This tutorial shows you how to use the SQL LAG () function to access data of the previous row from the current row.

Sep 13, 2025 · The LAG () function in SQL is one of the most powerful and flexible tools available for performing advanced data analysis. It is often used to compare rows, calculate differences, …

Dec 23, 2024 · The following example demonstrates the LAG function. The query uses the LAG function to return the difference in sales quotas for a specific employee over previous calendar …

This tutorial shows you how to use the LAG () function to access a row at a specific physical offset which comes before the current row.

Jul 5, 2024 · One of these powerful functions is the LAG() function, which is one of the commonly used window functions. It opens the door to comparing and calculating the change in values …

Jun 11, 2024 · The LAG () function – one of SQL’s window functions – is an important tool for planning and trend analysis. In this article, I’ll demonstrate how to include SQL LAG () in your …

Learn how to use SQL LEAD and LAG functions to access previous and next row values without self-joins. These powerful window functions make it easy to compare records, calculate …

In this blog, we’ll explore what LAG is, how it works, when to use it, and how it compares to related functions like LEAD and LAST_VALUE. With detailed examples and clear …

The Short Answer: What is the LAG () Function? The LAG () function is one of SQL’s window functions that allows you to create a new column that accesses a previous row from another …

The SQL Server LAG function is one of the Analytic functions that acts precisely opposite to LEAD to perform advanced data analytics. It allows you to access the data or value from a previous …