FORMULA & SQL / TOTALS

Difference from the average.
Tested, not guessed.

The Excel and Google Sheets formula and the SQL query, each run on the rows below. Open this with your own data ↗

The example rows

Row	A: Region	B: Rep	C: Amount	D: Order Date	E: Status	F: Customer
2	North	Ana	1,200	2026-03-01	Paid	Jo Smith
3	South	Ben	450	2026-03-15	Open	Raj Patel
4	North	Cy	300	2026-04-02	Paid	Lee Wong
5	East	Ana	980.50	2026-04-20	Paid	Mia Ross
6	North	Ben	75	2026-05-05	Open	Jo Smith
7	West	Dee	1,640	2026-05-18	Paid	Sam Okoro

Excel

=C2-AVERAGE($C$2:$C$7)

Amount (C2) minus the average of the Amount column ($C$2:$C$7).

Run on the example rows:

PostgreSQL

SELECT *, amount - AVG(amount) OVER () AS diff_from_average
FROM sales

Run on the example rows:

region	rep	amount	order_date	status	customer	diff_from_average
North	Ana	1200	2026-03-01	Paid	Jo Smith	425.75
South	Ben	450	2026-03-15	Open	Raj Patel	-324.25
North	Cy	300	2026-04-02	Paid	Lee Wong	-474.25
East	Ana	980.5	2026-04-20	Paid	Mia Ross	206.25
North	Ben	75	2026-05-05	Open	Jo Smith	-699.25
West	Dee	1640	2026-05-18	Paid	Sam Okoro	865.75

Other databases

MySQL

SELECT *, amount - AVG(amount) OVER () AS diff_from_average
FROM sales

SQL Server

SELECT *, amount - AVG(amount) OVER () AS diff_from_average
FROM sales

SQLite

SELECT *, amount - AVG(amount) OVER () AS diff_from_average
FROM sales

BigQuery

SELECT *, amount - AVG(amount) OVER () AS diff_from_average
FROM sales

Snowflake

SELECT *, amount - AVG(amount) OVER () AS diff_from_average
FROM sales

Paste your rows into the free tool and it writes this for your columns, then runs it on your data before you copy it. Open the tool ↗