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Displaying posts with tag: value expression (reset)
Dec
17
2013
Counting Distinct Records in SQL
Posted by Lukas Eder on Tue 17 Dec 2013 09:09 UTC
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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 … Continue reading Counting Distinct Records in SQL →

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