What is mathematical transformation in SQL?

Parthiban Kannan

Updated on February 9, 2026

< 1 min read

Mathematical transformation in SQL means applying arithmetic or numeric calculations on columns during extraction.
In my project, we calculated Profit = Revenue – Cost directly in the SELECT statement.
We also derived Profit Margin = (Revenue – Cost) / Revenue * 100.
Aggregations like SUM, AVG, MIN, MAX were used for grouped KPIs.
Rounding numeric values was done using ROUND() for reporting clarity.
We handled nulls with COALESCE to avoid calculation errors.
Percentage changes or growth rates were computed using expressions.
These transformations reduced the need for post-processing in Power Query.
It ensures KPIs are pre-calculated and ready for dashboards.
So mathematical transformation prepares numeric metrics efficiently at source.