Complete guide to T-SQL for data analysts: Introduction - Complete Guide to T-SQL for Data Analysts by Microsoft Press

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SQL and T-SQL for Beginners in 229 minutes – SQLServerCentral

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Sort and Filter Results in Transact-SQL (Part 3 of 7) | Programming Databases with T-SQL for Beginners

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Write Subqueries in Transact-SQL (Part 5 of 7) | Programming Databases with T-SQL for Beginners