This page is a quick reference checkpoint for COUNT OVER in SQLite: 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.
Uses standard SQLite window processing rules; aggregate window functions follow normal frame semantics; default frame is RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW unless overridden
If this behavior feels unintuitive, the tutorial below explains the underlying pattern step-by-step.
COUNT(expr) or COUNT() used as an aggregate window function with the OVER clause supporting PARTITION BY, ORDER BY, and optional frame clauses
SELECT dept, COUNT() OVER (PARTITION BY dept) AS dept_count FROM employees;
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 SQLite Documentation →Looking for more functions across all SQL dialects? Visit the full SQL Dialects & Window Functions Documentation.