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Matrix Addition of Elements
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SQL Basics: Create a FUNCTION
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Easy SQL - Ordering
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SQL Basics - Trimming the Field
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SQL Basics: Simple WHERE and ORDER BY
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SQL Basics: Simple DISTINCT
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SQL Basics: Simple JOIN with COUNT
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SQL Basics: Top 10 customers by total payments amount
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SQL Basics: Simple HAVING
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SQL Basics: Simple IN
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SQL Basics: Simple UNION ALL
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A Needle in the Haystack
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Convert a String to a Number!
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SQL Grasshopper: Select Columns
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