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5 kyu
Using LATERAL JOIN To Get Top N per Group
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SQL Basics: Simple PIVOTING data
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7 kyu
Easy SQL: Absolute Value and Log to Base
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Convert boolean values to strings 'Yes' or 'No'.
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GROCERY STORE: Logistic Optimisation
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GROCERY STORE: Support Local Products
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Easy SQL: Counting and Grouping
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SQL Basics: Repeat and Reverse
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Returning Strings
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Books That Are Always Being Returned
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Loan Eligibility: part 1
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SQL with Sailor Moon: Thinking about JOINs...
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SQL Grasshopper: Select Columns
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SQL Basics: Simple JOIN
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Century From Year
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