Herein, you'll learn how to use important SQL Server aggregate functions such as SUM, COUNT, MIN, MAX, and AVG. Following that, you'll learn how to manipulate text fields. To round out the modules, you'll power up your queries using GROUP BY and HAVING, which will enable you to perform more meaningful aggregations.
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Aggregating Data
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Summing
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Counting
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MIN, MAX and AVG
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Strings
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LEN'gth of a string
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Left and right
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Stuck in the middle with you
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Grouping and Having
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GROUP BY
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Having
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Grouping together