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6 kyu
SQL Basics: Simple PIVOTING data WITHOUT CROSSTAB
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SQL Bug Fixing: Fix the JOIN
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Maximum Multiple
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SQL with Sailor Moon: Thinking about JOINs...
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SQL Basics: Raise to the Power
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Easy SQL: Bit Length
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SQL: Padding Encryption
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SQL: Right and Left
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SQL Basics - Monsters using CASE
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SQL Basics: Simple UNION ALL
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SQL with LOTR: Elven Wildcards
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Easy SQL: Counting and Grouping
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