INSTR : CHAR VARCHAR2 Functions « PL SQL Data Types « 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

Java

Java Tutorial

Java Source Code / Java Documentation

Illustrator Tutorials

GIMP Tutorials

C# / C Sharp

C# / CSharp Tutorial

C# / CSharp Open Source

SQL Server / T-SQL Tutorial

Flash / Flex / ActionScript

VBA / Excel / Access / Word

XML

XML Tutorial

Microsoft Office PowerPoint 2007 Tutorial

Microsoft Office Excel 2007 Tutorial

Microsoft Office Word 2007 Tutorial

Oracle PL/SQL Tutorial » PL SQL Data Types » CHAR VARCHAR2 Functions

21. 5. 7. INSTR

INSTR locates one string/character in the other one:


v_nr:= instr(string,substring[,position,occurrence]);

INSTR returns the number of characters in the original string where the desired substring starts.

You can also specify the position from which you want the search to start (by default from the first character) and what occurrence of the desired string is required (by default, the first one).


SQL>

SQL> declare

  2      v1_tx VARCHAR2(20):='Hello, World!';

  3      v_nr  binary_integer;

  4  begin

  5      v_nr:= instr (v1_tx,'l');

  6      DBMS_OUTPUT.put_line(v_nr);

  7

  8      v_nr:= instr (v1_tx,'l',-2);

  9      DBMS_OUTPUT.put_line(v_nr);

 10

 11      v_nr:= instr (v1_tx,'l',2,2);

 12      DBMS_OUTPUT.put_line(v_nr);

 13  end;

 14  /

3

11

4



PL/SQL procedure successfully completed.



SQL>

21. 5. CHAR VARCHAR2 Functions
	21. 5. 1.	Useful character built-in functions
	21. 5. 2.	Compare char type value with blank space
	21. 5. 3.	Compare char type value with 'trim'
	21. 5. 4.	The most useful character specifications are
	21. 5. 5.	ASCII
	21. 5. 6.	SUBSTR
	21. 5. 7.	INSTR
	21. 5. 8.	Use the SUBSTR and INSTR at the same time.
	21. 5. 9.	REPLACE
	21. 5. 10.	TRANSLATE
	21. 5. 11.	PAD, RPAD, LPAD
	21. 5. 12.	TRIM
	21. 5. 13.	Extending your options with regular expressions
	21. 5. 14.	A Better Routine to Check Social Security Numbers

www.java2java.com | Contact Us

All other trademarks are property of their respective owners.