Meta characters « Regular Expressions Functions « Oracle PL/SQL Tutorial

Oracle PL/SQL Tutorial

1.	Introduction
2.	Query Select
3.	Set
4.	Insert Update Delete
5.	Sequences
6.	Table
7.	Table Joins
8.	View
9.	Index
10.	SQL Data Types
11.	Character String Functions
12.	Aggregate Functions
13.	Date Timestamp Functions
14.	Numerical Math Functions
15.	Conversion Functions
16.	Analytical Functions
17.	Miscellaneous Functions
18.	Regular Expressions Functions
19.	Statistical Functions
20.	Linear Regression Functions
21.	PL SQL Data Types
22.	PL SQL Statements
23.	PL SQL Operators
24.	PL SQL Programming
25.	Cursor
26.	Collections
27.	Function Procedure Packages
28.	Trigger
29.	SQL PLUS Session Environment
30.	System Tables Data Dictionary
31.	System Packages
32.	Object Oriented
33.	XML
34.	Large Objects
35.	Transaction
36.	User Privilege

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Oracle PL/SQL Tutorial » Regular Expressions Functions » Meta characters

18. 6. Meta characters
	18. 6. 1.	Meta characters
	18. 6. 2.	The period may be substituted for any letter and still maintain a match
	18. 6. 3.	Use the caret-anchor to insist the matching start at the beginning of the string
	18. 6. 4.	Asking for a match for a capital 'F' followed by any character
	18. 6. 5.	The search string cannot be anchored at the beginning and then searched from some other position
	18. 6. 6.	Negating Carets
	18. 6. 7.	A '^' followed by something else like an 'l' (a lowercase 'L')
	18. 6. 8.	Match a string where 'i' is followed by any one character and followed by another 'i'
	18. 6. 9.	Regexp_Substr
	18. 6. 10.	'*' matches zero or more repetitions
	18. 6. 11.	'+' matches one or more repetitions
	18. 6. 12.	'?' matches exactly zero or one repetition
	18. 6. 13.	Asking to match an 'a' and zero or more 'b's:
	18. 6. 14.	A series of 'b's immediately following the 'a'
	18. 6. 15.	Matching at least one 'b'
	18. 6. 16.	Want an 'e' followed by any number of other characters and then another 'e'
	18. 6. 17.	REGEXP_SUBSTR(value,'e.*e')
	18. 6. 18.	Non-greedy '?'
	18. 6. 19.	Empty Strings and the ? Repetition Character
	18. 6. 20.	The '?' says to match zero or one time

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