Chapters 9 & 10 edits
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@ -258,7 +258,7 @@ GROUP BY stabr, stataddr
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ORDER BY stabr, stataddr;
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-- Listing 9-11: Using the sum() aggregate function to total visits to
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-- libraries in 2014 and 2009
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-- libraries in 2016, 2017, and 2018
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-- 2018
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SELECT sum(visits) AS visits_2018
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@ -101,12 +101,6 @@ SET st_copy = st;
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-- Listing 10-10: Checking values in the st and st_copy columns
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SELECT st,
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st_copy
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FROM meat_poultry_egg_establishments
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ORDER BY st;
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-- With WHERE clause to check for equality
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SELECT st,
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st_copy
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FROM meat_poultry_egg_establishments
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