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Beginning SQL queries [electronic resource] : from novice to professional / Clare Churcher.

Churcher, Clare, author.
2016
QA76.73.S67 C485 2016eb
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Title
Beginning SQL queries [electronic resource] : from novice to professional / Clare Churcher.
Author
Churcher, Clare, author.
Edition
Second edition.
ISBN
9781484219553 (electronic book)
1484219554 (electronic book)
9781484219546
Published
[United States] : Apress, 2016.
Distributor
New York, NY : Distributed to the book trade worldwide by Springer,
Copyright
©2016
Language
English
Description
1 online resource.
Call Number
QA76.73.S67 C485 2016eb
Dewey Decimal Classification
005.75/6
Summary
Get started on mastering the one language binding the entire database industry. That language is SQL, and how it works is must-have knowledge for anyone involved with relational databases, and surprisingly also for anyone involved with NoSQL databases. SQL is universally used in querying and reporting on large data sets in order to generate knowledge to drive business decisions. Good knowledge of SQL is crucial to anyone working with databases, because it is with SQL that you retrieve data, manipulate data, and generate business results. Every relational database supports SQL for its expressiveness in writing queries underlying reports and business intelligence dashboards. Knowing how to write good queries is the foundation for all work done in SQL, and it is a foundation that Clare Churcher's book, Beginning SQL Queries, 2nd Edition, lays well. Write simple queries to extract data from a single table Combine data from many tables into one business result using set operations Translate natural language questions into database queries providing meaningful information to the business Avoid errors associated with duplicated and null values Summarize data with amazing ease using the newly-added feature of window functions Tackle tricky queries with confidence that you are generating correct results Investigate and understand the effects of indexes on the efficiency of queries.
Note
Includes index.
Access Note
Access limited to authorized users.
Source of Description
Online resource; title from PDF title page (SpringerLink, viewed July 13, 2016).
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1. Relational Database Overview
2. Simple Queries on One Table
3. A First Look at Joins
4. Nested Queries
5. Self Joins
6. Multiple Relationships Between Tables
7. Set Operations
8. Aggregate Operations
9. Window Function
10. Efficiency Considerations
11. Approaching A Query
12. Common Problems
Chapter 13: Appendix 1: Sample Database
Chapter 14: Appendix 2: Relational Notation.

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