Understanding the Delta computation
- Delta computation is a process of subtracting the value of one column from another within the same table but on different rows. This process is an important method, used in scenarios where historical data is stored in relational database tables.
- Using this method different insights are derived by comparing the values of specific data attributes over time or between various entities.
- The Delta computation helps to compute differences between columns on different rows. This method provides valuable insights to make informed decisions and facilitates a deeper understanding of dynamic data, which changes over time.
We will Computing a difference between two columns on different rows can be done using the window function, LAG() as below:
Compute a Difference (Delta) Between Two Columns on Different Rows in SQL Server
Delta computation is a process used in SQL Server to derive the difference between values in a specific column across different rows within the same table. This method is important for analyzing historical data stored in relational databases and allowing users to gain insights by comparing data attributes over time or across various entities.
In this article, We will learn about the Delta computation and the some approaches that help us to Compute a Difference (Delta) Between Two Columns on Different Rows in an SQL Server and so on.
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