Everything Is a Funnel, But SQL Doesn’t Get It

But lots of business concepts aren’t easily defined this way. Consider, for instance, a sales funnel in which prospects move through a series of stages, like “In trial,” “Contract negotiation,” and “Under legal review.” These stages often have an expected order, but not a strict one. Some prospects skip stages, some proceed through them in a different sequence, some stages happen concurrently, and sometimes, if a sale cycle goes sideways, steps get repeated.

Funnels are everywhere
Many metrics are more naturally expressed using sequences than SQL
Sequences are better at encoding causation than traditional relational tables

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