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Oracle 10g Feature: REGULAR EXPRESSIONS - 3

amitpatel66
2,367 Expert 2GB
Alternate Matching and Grouping of Expressions:

| Alternation Separates alternates, often used with grouping operator ()

( ) Group Groups subexpression into a unit for alternations, for quantifiers, or for backreferencing

[char] Character list Indicates a character list;
Most metacharacters inside a character list are understood as literals,with the exception of character classes, and the ^ and - metacharacters

Oracle's regular expression implementation supports the POSIX (Portable Operating System Interface) character classes as shown below:

[:alpha:] Alphabetic characters

[:lower:] Lowercase alphabetic characters

[:upper:] Uppercase alphabetic characters

[:digit:] Numeric digits

[:alnum:] Alphanumeric characters

[:space:] Space characters (nonprinting), such as carriage return, newline, vertical tab, and form feed

[:punct:] Punctuation characters

[:cntrl:] Control characters (nonprinting)

[:print:] Printable characters
Oct 9 '07 #1
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