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SQL Basics: Top 10 customers by total payments amount
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SQL Basics: Simple GROUP BY
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SQL Basics: Group By Day
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SQL Basics: Simple NULL handling
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SQL Bug Fixing: Fix the QUERY - Totaling
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SQL Basics: Simple JOIN and RANK
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SQL Basics: Create a FUNCTION
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SQL Bug Fixing: Fix the JOIN
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Hello SQL World!
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SQL Basics: Simple EXISTS
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SQL Basics: Simple JOIN
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SQL Basics: Simple UNION ALL
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SQL Basics: Simple table totaling.
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Design a Simple Automaton (Finite State Machine)
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