Автор: Djoni Darmawikarta
Год: November 17, 2016
The Joy of Applying Subqueries, the 4th volume of the SQL and PL/SQL in Practice series, is for those who need to learn how to use subqueries.
A subquery is a SELECT statement within another SQL statement. Seemingly plain, subquery has variety of options that beginners often overlook their opportunities to solve the requirements for queries and data maintenance. Knowing where and which way to apply, you will enjoy having subquery in your SQL armory. This book, by way of examples, shows you the variety of ways you can apply subqueries.
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