SQLQuokkaSQLQuokkaGoogle Ads Optimization engines surface highest performing creative copies within each industry segment. Write a SQL query using the `DENSE_RANK()` window function to determine the top 2 ranked advertisements by click-through rate (`clicks / impressions`) within each `category_name`. If ads within the same category share identical click-through rates, they must receive the same rank. Return `ad_id`, `category_name`, `headline`, `ctr_pct` (rounded to 2 decimal places), and `rank_in_category`. Sort the results by `category_name` ascending, then `rank_in_category` ascending, and finally `ad_id` ascending. Note: Window function support requires DuckDB / full SQL engine capabilities. This question is staged for the upcoming DuckDB browser engine.
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