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Counting Distinct Records in SQL

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justin cater

Posts: 19616
Nickname: justin78
Registered: Mar, 2011

Justin Cater is executive editor at Java Code Geeks
Counting Distinct Records in SQL Posted: Dec 24, 2013 8:40 AM
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The SQL language and its depths… Some of you readers might be aware of MySQL’s capability of counting distinct records through the COUNT() aggregate function. The MySQL documentation reads: COUNT(DISTINCT expr,[expr...]) Returns a count of the number of rows with different non-NULL expr values. In other words, you can count distinct first and last names very easily: SELECT […]
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