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5 kyu
SQL Statistics: MIN, MEDIAN, MAX
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SQL Basics: Group By Day
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Calculating Month-Over-Month Percentage Growth Rate
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Relational division: Find all movies two actors cast in together
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SQL Basics - Monsters using CASE
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Using Window Functions To Get Top N per Group
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Conditional Count
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SQL Basics: Simple PIVOTING data WITHOUT CROSSTAB
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SQL Basics: Truncating
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SQL Bug Fixing: Fix the QUERY - Totaling
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SQL Basics: Simple HAVING
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SQL Basics: Simple NULL handling
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Easy SQL: Moving Values
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SQL Basics: Simple EXISTS
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SQL: Concatenating Columns
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