Oracle PL/SQL 9i/10g - Introduction

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Advantages of PL/SQL
===================

1.Support for SQL
2.Support for object-oriented programming
3.Better performance
4.Higher productivity
5.Full portability
6.Tight integration with Oracle
7.Tight security

Types of Blocks in PL/SQL

1.anonymous Block
2.named Block/stored Procedure

Features of PL/SQL

1.block Structure
2.variable And Constants
3.control Structure
4.exception Handling
5.cursor
6.procedure
7.function
8.package
9.trigger
10.user-defined Types

Basic Structure of PL/SQL Block

Expand|Select|Wrap|Line Numbers

 
DECLARE

<VARIABLE>

<CURSOR>

<EXCEPTION>

...................

...................

BEGIN

<EXECUTABLE STATEMENT>

EXCEPTION

<EXCEPTION HANDLER>

END;

PL/SQL--Data Types

1.Scalar--------NUMBER,VARCHAR2,DATE,BOOLEAN ...etc.
2.Reference-----REF CURSOR
3.Composite-----RECORDTYPE,NESTED TABLE,VARRYING ARRAY
4.LOB-----------BLOB,CLOB,NCLOB,BFILE
5.Anchoring-----%TYPE,%ROWTYPE

The following datatypes are also supported for cross-language compatability.

SMALLINT,NATURAL,NATURALN,POSITIVE,POSITIVEN,
PLS_INTEGER,DEC,DECIMAL
BINARY_INTEGER,BINARY_FLOAT,BINARY_DOUBLE

May 10 '07 #1

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Oracle PL/SQL 9i/10g - Introduction

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