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Count Weekdays
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SQL Basics: Create a FUNCTION (DATES)
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Easy SQL: LowerCase
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Collect Tuition (SQL for Beginners #4)
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SQL Grasshopper: Select Columns
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SQL: Concatenating Columns
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SQL: Right and Left
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SQL Basics: Simple JOIN with COUNT
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SQL Basics: Simple DISTINCT
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SQL Basics: Simple GROUP BY
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Easy SQL - Ordering
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Remove First and Last Character
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