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  • Book Overview & Buying SQL Server 2014 Development Essentials
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SQL Server 2014 Development Essentials

SQL Server 2014 Development Essentials

By : A. Masood-Al-Farooq
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SQL Server 2014 Development Essentials

SQL Server 2014 Development Essentials

3 (3)
By: A. Masood-Al-Farooq

Overview of this book

This book is an easy-to-follow, comprehensive guide that is full of hands-on examples, which you can follow to successfully design, build, and deploy mission-critical database applications with SQL Server 2014. If you are a database developer, architect, or administrator who wants to learn how to design, implement, and deliver a successful database solution with SQL Server 2014, then this book is for you. Existing users of Microsoft SQL Server will also benefit from this book as they will learn what's new in the latest version.
Table of Contents (8 chapters)
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7
Index

Subqueries

A subquery is a query that is nested inside a SELECT, INSERT, UPDATE, or DELETE statement, or inside another subquery. Subqueries are often used in situations where a query depends on the results of another query. SQL Server supports noncorrelated and correlated subqueries.

In a noncorrelated subquery, the inner query is independent and gets evaluated first, then passes results to the outer query. A noncorrelated (independent) subquery can be independently evaluated and relies only on its own SELECT clause for instructions.

In a correlated subquery, the outer query provides values for the dependant inner subquery evaluation. SQL Server passes the subquery results back to the outer query for evaluation. A correlated (dependant) subquery receives values from the outer SELECT statement.

Tip

Subqueries are useful for solving complex data retrieval and modification problems; however, this method is often less efficient than performing a join operation.

Typically, the statements that include...

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SQL Server 2014 Development Essentials
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