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6 kyu
SQL Basics: Simple JOIN and RANK
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SQL Basics: Simple IN
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6 kyu
SQL Basics: Simple EXISTS
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SQL Basics: Simple WITH
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SQL Basics: Create a FUNCTION (DATES)
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SQL Bug Fixing: Fix the QUERY - Totaling
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SELECT prime numbers
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SQL Bug Fixing: Fix the JOIN
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SQL Basics: Simple HAVING
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SQL Basics: Simple UNION ALL
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Analyzing the sales by product and date
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8 kyu
Grasshopper - Messi Goals
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Retired
N-th Power
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Invert values
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Are You Playing Banjo?
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