Important Points About SQL LAG() Function
- The SQL LAG() function is a window function that allows users to access data from earlier rows in a dataset.
- It enables users to compare current row values with values from previous rows, especially those related to time or specific columns.
- The LAG() function is valuable for analyzing changes over time, such as stock market data, daily trends, and alterations in multiple columns.
SQL LAG() Function
The SQL LAG() function is a window function that provides access to a row at a specified physical offset which comes before the current row.
LAG function in SQL Server is used to compare current row values with values from the previous row.