CTE Materialization
Learn what it means for a CTE to be materialized or inlined, which engines decide what, and how execution strategy differs from name scope.
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CTEs and Temporary Tables
A WITH clause is not a temporary table. Compare scope, lifetime, visibility, and staleness with DuckDB examples.
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SQL for Data Engineers
Understand SQL through examples for filtering, cleaning, joins, aggregation, windows, and transactions in DuckDB.