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7 kyu
SQL: Disorder
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SQL Basics: Simple JOIN
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SQL Basics: Simple JOIN with COUNT
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Best-Selling Books (SQL for Beginners #5)
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Collect Tuition (SQL for Beginners #4)
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On the Canadian Border (SQL for Beginners #2)
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Adults only (SQL for Beginners #1)
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GROCERY STORE: Logistic Optimisation
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GROCERY STORE: Support Local Products
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GROCERY STORE: Inventory
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Calculating Batting Average
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SQL: Concatenating Columns
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SQL with Harry Potter: Sorting Hat Comparators
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