SQL COUNT Explained: COUNT(*), COUNT(column), and COUNT(DISTINCT)
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SQL COUNT Explained: COUNT(*), COUNT(column), and COUNT(DISTINCT)
In this quick SQL tutorial, you’ll learn how to use the COUNT() function in different ways: COUNT(*) – Count total rows in a table COUNT(column) – Count non-null values in a specific column COUNT(DISTINCT column) – Count unique, non-null values This guide helps you understand how COUNT works in SQL. Perfect for beginners learning SQL or ...
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