This page is a quick reference checkpoint for COUNT OVER in Snowflake: behavior, syntax rules, edge cases, and a minimal example; plus the official vendor documentation.
COUNT OVER returns the number of rows in the window frame.
When used as a window function, DISTINCT is prohibited in the OVER form; default frame with ORDER BY is RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW; explicit RANGE frames require a single input argument and COUNT(table.) is not supported.
If this behavior feels unintuitive, the tutorial below explains the underlying pattern step-by-step.
COUNT( [ DISTINCT ] <expr1> [ , <expr2> ... ] ) OVER ( [ PARTITION BY <expr3> ] [ ORDER BY <expr4> [ ASC | DESC ] [ <window_frame> ] ] )
SELECT region, amount, COUNT(amount) OVER (PARTITION BY region ORDER BY amount) AS count_over_region FROM sales;
If you came here to confirm syntax, you’re done. If you came here to get better at window functions, choose your next step.
COUNT OVER is part of a bigger window-function pattern. If you want the “why”, start here: Aggregate Window Functions
Reading docs is useful. Writing the query correctly under pressure is the skill.
For the authoritative spec, use the vendor docs. This page is the fast “sanity check”.
View Snowflake Documentation →Looking for more functions across all SQL dialects? Visit the full SQL Dialects & Window Functions Documentation.