A practical guide to how databases work, covering schema design, SQL, indexing, transactions, concurrency, caching, pagination, and database selection.

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September 18, 2026 • Cubans are living through near-constant blackouts after an executive order that called the Cuban government an “unusual and extraordinary threat” to U.S. national security and ...

-- Raw tables loaded from the original CSV files. CREATE SCHEMA IF NOT EXISTS instacart_bronze; -- Cleaned and standardized tables. CREATE SCHEMA IF NOT EXISTS instacart_silver; -- Dimension and fact ...

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