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6 kyu
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SQL Tuning: Function Calls
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Relational division: Find all movies two actors cast in together
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SQL Basics: Simple Hierarchical structure
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SQL: Bytes in String from Ints
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SQL Basics: Simple UNION ALL
11,867matt c
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SQL Statistics: MIN, MEDIAN, MAX
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Collect Tuition (SQL for Beginners #4)
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SQL Basics: Simple HAVING
18,957matt c
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