CHAPTER 5
Retrieval: Functions
This chapter is a logical continuation of the previous chapter. The main topic is still retrieval. It introduces functions and regular expressions, which enable you to formulate more powerful and complicated queries in an easy way.
Oracle supports an abundance of functions. Apart from the various ANSI/ISO SQL standard functions, many Oracle-specific functions have been added to Oracle’s SQL implementation over the years.
The chapter begins with an overview of the seven categories of functions: arithmetic, text, regular expression, date, general, conversion, and group. The remaining sections discuss each type, with ...
Get Beginning Oracle SQL: for Oracle Database 12c, Third Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
