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SQL Basics: Simple EXISTS
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SQL Basics: Simple NULL handling
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SQL Basics: Mod
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SQL Basics: Simple IN
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SQL Basics: Top 10 customers by total payments amount
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Maximum Multiple
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GROCERY STORE: Logistic Optimisation
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SQL Basics: Simple HAVING
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SQL Basics: Simple JOIN with COUNT
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Growth of a Population
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Two to One
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Convert to Binary
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Function 2 - squaring an argument
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Take the Derivative
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