Database Reference
In-Depth Information
7
Operators, Conditions, and Pseudocolumns
In this chapter:
What is precedence?
What is an operator and what is available?
What is a condition and what is available?
What are pseudocolumns and what is available?
Note:
Backus-Naur Form syntax angle brackets are used syntactically in this
chapter to represent substitution of all types. For example, <expression> =
<expression>.
Operators, conditions, and pseudocolumns are used and often explained
throughout this topic. This chapter may duplicate parts of other chapters
with the intention of including all specific details in a single chapter. Addi-
tionally, some of the content of this chapter is common to many software
products. Need it be repeated? Yes, because this title is intended for use as
an SQL reference topic.
Note:
This chapter may reclassify the categories of operators, conditions,
and pseudocolumns both with respect to Oracle documentation and other
chapters in this topic.
Let's begin with the simplest of things, precedence.
