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Joins and Blends

Thursday, March 10th, 2016

Answer these questions using the Superstore sample data.

1. Find the sale value for items ordered in 2012. Exclude the value of items which were returned.

2,158,725

72,006

1,843,186

8,630,660

2. All rows from both tables are returned in an INNER JOIN.

True

False

3. LEFT JOIN returns all rows from the left table, with the matching rows in the right table.

True

False

4. A LEFT JOIN or INNER JOIN creates a row each time the join criteria is satisfied, which can result in duplicate rows. One way to avoid this is to use data blending instead.

True

False

Be sure to click Submit Quiz to see your results!

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About the Author: Lukas Halim

I earned a Masters in Analytics from NC State in 2013 and now work as a data analyst in the health insurance industry. Using tools such as SAS, Tableau, and Teradata, I conduct analysis to help my company improve healthcare affordability and customer engagement.

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