FORMULA & SQL / TOTALS
Standard deviation of a column.
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 |
The formula
Excel
=STDEV.S(C2:C7)
STDEV.S(the Amount column (C2:C7)).
Run on the example rows:
Result598.7197800307
The SQL
PostgreSQL
SELECT STDDEV(amount) AS std_deviation FROM sales
Other databases
MySQL
SELECT STDDEV(amount) AS std_deviation FROM sales
SQL Server
SELECT STDEV(amount) AS std_deviation FROM sales
BigQuery
SELECT STDDEV(amount) AS std_deviation FROM sales
Snowflake
SELECT STDDEV(amount) AS std_deviation FROM sales
Your own data
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 ↗