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SQL Tutorial: Selecting Ungrouped Columns Without Aggregate Functions
( go to the article → https://www.dataquest.io/blog/sql-tutorial-selecting-ungrouped-columns-without-aggregate-functions/ )
When is a SQL query that returns the correct answer actually wrong? In this tutorial, we're going to take a close look at a very common mistake. It's one that will actually return the right answer, but it's still a mistake that's important to avoid.That probably sounds rather mysterious, so let's dive right in. We'll […] The post SQL Tutorial: Selecting Ungrouped Columns Without Aggregate Functions appeared first on Dataquest.
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