March 2014
Beginner
440 pages
10h 57m
English
book
Beginning Oracle SQL: for Oracle Database 12c, Third Edition
by Lex De Haan, Tim Gorman, Inger Jørgensen, Melanie Caffrey
Content preview from Beginning Oracle SQL: for Oracle Database 12c, Third Edition
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CHAPTER 10
Views
This chapter covers views, a very important component of the relational model (see Ted Codd’s rules in Chapter 1). The first section explains the concept of views. The second section discusses how to use the CREATE VIEW command to create views. In the next section, you’ll learn about the various ways you can use views in SQL, in the areas of retrieval, logical data independency, and security.
Then, in Section 10.4, we explore the (im) possibilities of data manipulation via views. How does it work, which are the constraints, and what should we consider? You’ll learn about updatable views, nonupdatable views, and the WITH CHECK ...
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