SQLCTErecursivetutorial
Multiple CTEs in one query: chained WITH for beginners
Multiple CTEs separated by commas let you build a query as a chain of steps: compute one thing, build the next on top of it, then assemble the final result. Plain words: chained CTEs, reusing intermediate results, and recursive CTEs for hierarchies.
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In the previous article we covered a single
WITH … AS. The real power of CTEs shows up when you chain them: each next one builds on the previous. A massive subquery becomes a sequence of clear steps.This article is currently in Russian. The full English translation is on the way.