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, and …

Nov 18, 2025 · LAG provides access to a row at a given physical offset that comes before the current row. Use this analytic function in a SELECT statement to compare values in the current row with …

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 over a …

SQL Server LAG() is a window function that provides access to a row at a specified physical offset which comes before the current row. In other words, by using the LAG() function, from the current row, you …

Jun 11, 2024 · SQL w indow functions, also known as analytical functions or OVER functions, add a new dimension to data analysis. They allow you to include aggregates or data from other rows alongside …

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 changes, and …

It allows you to access the data or value from a previous row without using any SELF JOIN. This LAG function is beneficial in comparing the current row value with its previous row so that you can …

The SQL LAG () function is a powerful analytical function that allows you to access data from a previous row within a result set. Specifically, it allows you to retrieve data from a specified offset before the …

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 explanations, you’ll be …

Discover how to use the LAG () function in SQL with examples, common use cases, and error handling tips to optimize your queries.