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Data work in 2026 asks for more than chart building. Professionals are expected to clean data, query databases, explain ...

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Shelley Doll finishes her coverage of SQL data types with an overview of datetime and interval data types. Learn more about the basic syntax of these standard SQL types. Datetimes and intervals are ...

SQL has dominated data querying for decades. Newer query languages offer more elegance, simplicity, and flexibility for modern use cases. For the last three decades, databases and Structured Query ...

Experts advise focusing on Python, MySQL, and Networking, practicing output questions, mastering SQL basics, revising key ...