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Data Analytics & Visualization All-in-One For Dummies
book

Data Analytics & Visualization All-in-One For Dummies

by Jack A. Hyman, Luca Massaron, Paul McFedries, John Paul Mueller, Lillian Pierson, Jonathan Reichental, Joseph Schmuller, Alan R. Simon, Allen G. Taylor
April 2024
Beginner content levelBeginner
832 pages
20h 32m
English
For Dummies
Content preview from Data Analytics & Visualization All-in-One For Dummies

Chapter 2

Drilling Down to the SQL Nitty-Gritty

IN THIS CHAPTER

Bullet Executing SQL statements

Bullet Using (and misusing) reserved words

Bullet Working with SQL’s data types

Bullet Handling null values

Bullet Applying constraints

This chapter gets into the nitty-gritty of SQL. This is knowledge you need to master before you embark on actually writing SQL statements. SQL has some similarities to computer languages you may already be familiar with and some important differences. The chapter touches on some of these similarities and differences, but others are discussed later in this book (Book 4) at the appropriate points in a complete discussion of SQL.

Executing SQL Statements

SQL is not a complete language, but a data sublanguage. As such, you cannot write a program in the SQL language like you can with C or Java. That doesn’t mean SQL is useless, though. There are several ways that you can use SQL. Say you have a query editor up on your screen, and all you want is the answer to a simple question. Just type an ...

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Publisher Resources

ISBN: 9781394244096Purchase Link