PURPOSE OF DEFINING ENHANCEMENT CATEGORY

We define an enhancement category for the table to enhance the structures and tables created in ABAP Dictionary.

PURPOSE OF RQUEST ID

The request id is a general purpose request identifier used to group several assignments into one request.the request id can e used for instance when integrating with SAP bussiness object access control

PURPOSE OF TABLE MAINTENANCE GENERATOR

A Database table can be manipulated by a program or through a maintenance view.
the main purpose of table maintenance  view for tables so that the table entries can be created , modified or deleted.

ADVANTAGE AND DISADVANTAGE OF SAP SYSTEM

ADVANTAGES OF SAP SYSTEM

• SAP sytem reduces the possibilty of redundancy errors.
• SAP system provides flexibility.
• SAP System is real Time.
• Integration can be the highest benefit of them.
• There is only One Single Comprehensive Database.

DISADVANTAGES OF SAP SYSTEM

• SAP is very Expensive and time consuming for implementation.
• It requires a company to implement changes.
• very complex.

ENTERPRIZE RESOURCE PLANNING AND ITS ADVANTAGES AND DISADVANTAGES.

ENTERPRIZE RESOURSE PLANNING
A system that automates and integrates all modules of bussiness areas is known as erp system or simply erp.
A ERP system is used to integrate several data sources and processes such as manufacturing , control and distribution of goods in an organization .
A ERP system is primarily module based which implies that it consist of various modular software applications or modules.
these modules of an ERP system are linked to each other by a centralized database.

ADVANTAGES OF AN ERP SYSTEM

•  ERP System helps synchonize data & keep it updated.
• ERP system improves the performance and efficiency of bussiness processing .
• ERP system provides visibility.
• improved customer service and satisfaction.

DISADVANTAGES OF AN ERP SYSTEM

• Customization of the ERP system is limited .
• Once a system is establised , switching costs are very high.

DATA CLASS AND ITS TYPE

The Data class determines in which table space the table is stored when it is created in
the database.

Types of data classes
APPL0 - Master data (data frequently accessed but rarely updated).
APPL1 - Transaction data (data that is changed frequently).
APPL2 - Organizational data (customizing data that is entered when system is
configured and then rarely changed).

The other two types are:
- USR
- USR1 – Intended for customer’s own developments.

DIFFERENCE BETWEEN LSMW AND BDC TOOL

BDC is mainly for any customized application where as lsmw is generally for normal SAP application.
BDC is SAP to SAP communication tool where as Lsmw is a non SAP to SAP Communication Tool.