Summary: in this tutorial, you will learn about SQL window functions that solve complex query challenges easily. Introduction to SQL Window Functions # The aggregate functions perform calculations across rows and return a single output row.

This tutorial shows you how to use the SQL FIRST_VALUE() function to return the first value in an ordered set of values.

Introduction to SQL ROW_NUMBER() Function # The ROW_NUMBER() is a window function that assigns a sequential integer number to each row in the result set. Here’s the syntax of the ROW_NUMBER() function:

This tutorial shows how to use SQL RANK() function to find ranks of rows in a result set. It provides some practical applications of the RANK() function.

You'll learn how to use the SQL PARTITION BY clause to divide a result set into multiple partitions to which a window function applies.

This SQL Tutorial helps you master SQL quickly and effectively with clear concepts, hands-on examples, and interactive quizzes. Whether you’re a software developer, database administrator, data analyst, or data scientist, this SQL tutorial will help you unlock the power of SQL for managing and analyzing data.

This tutorial shows you how to access data of a row at a specific physical offset that follows the current row using the SQL LEAD() function.

This tutorial shows you how to use the SQL PERCENT_RANK() function to calculate the percentile rankings of rows in a result set.

This section provides you with many built-in SQL functions including aggregate functions, date functions, string functions, control flow functions, window functions, and math functions.

SQL 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 can access data of the previous row, or from the second row before the current row, or from the third row before current row, and so on.