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Teradata SQL by Tom Coffing, Mike Larkins

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Chapter 14 - Sub-query Functions

“A little man often casts a long shadow.”

- Italian Proverb

 

An IN List is much like a Subquery

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SELECT *

FROM Employee_Table

WHERE Dept_No IN(100, 200) ;

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This query is very simple and easy to understand. It uses an IN List to find all Employees who are in Dept_No 100 or Dept_No 200.

 

An IN List Never has Duplicates – Just like a Subquery

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What is going on with this IN List? Why in the world are their duplicates ...

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