September 2015
Beginner
288 pages
5h 39m
English
Content preview from Oracle PL/SQL in 10 Minutes, Sams Teach Yourself
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Lesson 4. Retrieving Data
In this lesson, you’ll learn how to use the SELECT statement to retrieve one or more columns of data from a table.
The SELECT Statement
Note: Sample Tables Required
From this point on, all lessons use the sample database tables. If you have yet to install these, please refer to Lesson 3, “Working with Oracle,” before proceeding.
As explained in Lesson 1, “Understanding SQL,” SQL statements are made up of plain English terms. These terms are called keywords, and every SQL statement is made up of one or more keywords. The SQL statement you’ll probably use most frequently is the SELECT statement. Its purpose is to retrieve information from one or more tables.
To use SELECT to retrieve table data, you must, at a minimum, ...
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