Skip Headers
Oracle® Database SQL Reference
10g Release 2 (10.2)

Part Number B14200-02
Go to Documentation Home
Home
Go to Book List
Book List
Go to Table of Contents
Contents
Go to Index
Index
Go to Master Index
Master Index
Go to Feedback page
Contact Us

Go to previous page
Previous
Go to next page
Next
PDF · Mobi · ePub

Perl-influenced Extensions in Oracle Regular Expressions

Oracle Database regular expression functions and conditions accept a number of Perl-influenced operators that are in common use, although not part of the POSIX standard. Table C-3 lists those operators. For more complete descriptions with examples, please refer to Oracle Database Application Developer's Guide - Fundamentals.

Table C-3 Perl-influenced Operators in Oracle Regular Expressions

Operator Description

\d

A digit character.

\D

A nondigit character.

\w

A word character.

\W

A nonword character.

\s

A whitespace character.

\S

A non-whitespace character.

\A

Matches only at the beginning of a string, or before a newline character at the end of a string.

\Z

Matches only at the end of a string.

*?

Matches the preceding pattern element 0 or more times (nongreedy).

+?

Matches the preceding pattern element 1 or more times (nongreedy).

??

Matches the preceding pattern element 0 or 1 time (nongreedy).

{n}?

Matches the preceding pattern element exactly n times (nongreedy).

{n,}?

Matches the preceding pattern element at least n times (nongreedy).

{n,m}?

Matches the preceding pattern element at least n but not more than m times (nongreedy).