SQL - How to Use Rollup Operator to Calculate SubTotal and GrandTotal at hierarchal Level

In this tutorial, you will learn "How to Use Rollup Operator to Calculate SubTotal and GrandTotal at hierarchal Level in SQL" in SQL Server.

ROLLUP is an extension of the SQL GROUP BY clause, used to generate summary reports with subtotals and grand totals. It helps in aggregating data at multiple levels of granularity..

👍The ROLLUP operator produces a result set that shows aggregates for a hierarchy of values.

👍It’s typically used to create subtotals and grand totals.

👍It works from left to right, creating subtotals that roll up from the most detailed level to a grand total.

👍NULL values represent subtotals and the grand total.

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