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Relational division: Find all movies two actors cast in together
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SQL Basics: Top 10 customers by total payments amount
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SQL Basics: Simple Hierarchical structure
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SQL Basics: Simple JOIN and RANK
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SQL Basics: Simple DISTINCT
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SQL Grasshopper: Select Columns
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Adults only (SQL for Beginners #1)
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Easy SQL: Square Root and Log
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1. Find all active students
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SQL Basics: Simple MIN / MAX
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Collect Tuition (SQL for Beginners #4)
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On the Canadian Border (SQL for Beginners #2)
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SQL Basics: Mod
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Easy SQL - Ordering
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Easy SQL: Convert to Hexadecimal
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