Jul 17, 2020 · LAG() and LEAD() are positional functions. These are window functions and are very useful in creating reports, because they can refer to data from rows above or below the current row. …

Jul 11, 2025 · In this article, we will learn the LEAD () and LAG () functions in MySQL, covering their syntax, parameters, and key differences. You’ll learn how to use these functions with real-world …

Mar 3, 2024 · The lag function allows me to look back at previous rows without breaking a sweat, while the lead function lets me peek into the future by accessing data from upcoming rows.

Summary: in this tutorial, you will learn how to access data of a previous row from the current row using the SQL LAG() function. SQL LAG() is a window function that provides access to a row at a specified …

May 31, 2018 · The LAG function has the ability to fetch data from a previous row, while LEAD fetches data from a subsequent row. Both functions are very similar to each other and you can just replace …

Learn SQL LEAD and LAG functions with clear examples. Access previous and next row values, compare records, and prepare for SQL interview questions with confidence.

#### How do LEAD () and LAG () Window Functions work? `LEAD ()` and `LAG ()` are **time-series window functions** used to **access data from rows that come after**, or **before the current row** …

Nov 18, 2025 · There was a bug fix in SQL Server 2022 CU4 related to IGNORE NULLS in LAG and LEAD. For more information on this argument in Azure SQL Edge, see Imputing missing values. …

Jan 27, 2024 · This tutorial is designed to introduce the LEAD () and LAG () functions in MySQL 8 and demonstrate how they can be skillfully applied through multiple hands-on examples.

Aug 12, 2025 · Two powerful window functions, LAG() and LEAD(), make this incredibly easy. What Are LAG and LEAD? LAG(): Returns data from a previous row relative to the current row in a result set. …