SQL Server Queries Part 11 - Subqueries
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By Andrew Gould
https://www.wiseowl.co.uk - The idea of a subquery is pretty simple: it's just one query nested inside another. If that doesn't sound particularly useful then you should watch this video to find out why it is! You'll learn how to place a subquery in a SELECT list or a WHERE clause, how to add criteria to a subquery, and how to handle subqueries which return multiple values.
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https://www.wiseowl.co.uk/files/execi...
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