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Challenge: Two actors who cast together the most
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Conditional Count
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SQL Basics - Monsters using CASE
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SQL Basics: Top 10 customers by total payments amount
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SQL with Harry Potter: Sorting Hat Comparators
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SQL Basics: Simple PIVOTING data WITHOUT CROSSTAB
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Counting overlapping events
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Easy SQL: Rounding Decimals
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Easy SQL: LowerCase
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GROCERY STORE: Inventory
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SQL with Street Fighter: Total Wins
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Reverse polish notation calculator
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Hamming Distance
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