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Oracle® 9i SQL Exam Cram™ 2 (Exam 1Z0-007) by Gavin Powell

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Chapter 5. Single Row Functions

Terms You Need to Understand

  • ✓ Single row function

  • ✓ String function

  • ✓ Datetime function

  • ✓ Conversion function

Concepts You Need to Master

  • ✓ Single row functions

  • ✓ Differences between string, number, datetime, and conversion functions

  • ✓ Where functions can be used

  • ✓ Nesting functions in other functions

  • ✓ Number conversion function formatting

  • ✓ Date conversion function formatting

This chapter describes single row functions. Single row functions operate within or as expressions on each row of a SQL statement. By definition, a function is a piece of compiled or interpreted code used to do some processing and return a value. Because a function returns a value, it can be embedded into an expression.

What Is a Function?

A function ...

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