Concatenate two string variables : VARCHAR2 « 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 Source Code / Java Documentation

Java Open Source

Jar File Download

Photoshop Tutorials

Flash Tutorials

3ds-Max Tutorials

Illustrator Tutorials

C# / CSharp Tutorial

C# / CSharp Open Source

ASP.NET Tutorial

JavaScript DHTML

JavaScript Tutorial

JavaScript Reference

HTML CSS Reference

Python Tutorial

Python Open Source

SQL Server / T-SQL

SQL Server / T-SQL Tutorial

Oracle PL / SQL

VB.Net Tutorial

Flash / Flex / ActionScript

VBA / Excel / Access / Word

Microsoft Office PowerPoint 2007 Tutorial

Microsoft Office Excel 2007 Tutorial

Microsoft Office Word 2007 Tutorial

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

21. 4. 10. Concatenate two string variables


SQL>

SQL>

SQL> SET ECHO ON

SQL> SET SERVEROUTPUT ON

SQL> DECLARE

  2    a     VARCHAR2(30);

  3    b     VARCHAR2(30);

  4    c     VARCHAR2(30);

  5  BEGIN

  6    a := ' AAA ';

  7    b := ' BBB ';

  8    c := a || b;

  9    DBMS_OUTPUT.PUT_LINE(c);

 10  END;

 11  /

AAA  BBB



PL/SQL procedure successfully completed.



SQL>

SQL>

21. 4. VARCHAR2
	21. 4. 1.	VARCHAR2
	21. 4. 2.	VARCHAR2 type variable
	21. 4. 3.	varchar2 type with default value
	21. 4. 4.	Trim a text string in PL/SQL
	21. 4. 5.	Test the strings for equality
	21. 4. 6.	Using Single Quote Characters as Part of Text Strings
	21. 4. 7.	Represents the old way of placing quotes inside the text, namely to double them
	21. 4. 8.	Concatenate several string constants
	21. 4. 9.	Concatenate both string variables and constants
	21. 4. 10.	Concatenate two string variables
	21. 4. 11.	Comparison of CHAR with VARCHAR2.
	21. 4. 12.	When comparing CHAR strings against VARCHAR2 strings, use the rtrim function to eliminate trailing spaces
	21. 4. 13.	Constants are compared using blank-padded comparison semantics
	21. 4. 14.	Fixed length strings are also compared with blank-padded comparison semantic
	21. 4. 15.	Comparison of a fixed length string and a literal
	21. 4. 16.	Compare a variable length string against a fixed length, and the trailing spaces do matter.
	21. 4. 17.	The maximum lengths of varchar2 strings do not matter, only the assigned values
	21. 4. 18.	Demonstrates that empty strings are NULL

www.java2java.com | Contact Us

Copyright 2009 - 12 Demo Source and Support. All rights reserved.

All other trademarks are property of their respective owners.