This page is a quick reference checkpoint for MIN OVER in BigQuery: behavior, syntax rules, edge cases, and a minimal example; plus the official vendor documentation.
MIN OVER returns the smallest value in the window frame.
Returns the minimum non-NULL value in a group; when used with OVER it becomes a window function. If the group is empty or all values NULL, returns NULL. If any argument is NaN, returns NaN.
If this behavior feels unintuitive, the tutorial below explains the underlying pattern step-by-step.
MIN(expression) [ OVER (window_clause) ]
SELECT category, price, MIN(price) OVER (PARTITION BY category) AS category_min_price FROM products;
If you came here to confirm syntax, you’re done. If you came here to get better at window functions, choose your next step.
MIN 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 BigQuery Documentation →Looking for more functions across all SQL dialects? Visit the full SQL Dialects & Window Functions Documentation.