SQLQuokkaSQLQuokkaMeta measures how often people who open the post composer actually publish. Treat 2025-09-10 as today, so yesterday is 2025-09-09. For each app, the post rate is the number of 'post' events divided by the number of 'compose_open' events, both counted from yesterday only. Other event types are ignored. Apps with no 'compose_open' events yesterday are left out, and an app with opens but no posts has a rate of 0. Write an SQL query that returns app and post_rate (a ratio between 0 and 1) rounded to 2 decimal places. Order the results by post_rate descending, then app ascending.
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