SQL-BASICS5 MIN READ
Event Funnel: Read the Rows Through the SQL Pipeline
Interpret how row counts change as a query moves from source rows through filters, joins, groups, and aggregate filters.
Trace how a product-events query turns raw events into cohort rows. Product Event Query Shape Raw app events All click, trial, and billing events in the export 1,200 rows WHERE keeps eligible events Trial-start events from the last 14 days 740 rows JOIN adds account context Events with a matching account record 690 rows GROUP BY plan and month One row per plan-month cohort 12 groups HAVING keeps active cohorts Groups with at least 30 trial starts 5 groups WHERE filters individual rows
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