DATA DICTIONARY:



Data Dictionary is a central source of data in a data management system. Its main function is to support the creation and management of data definitions. 


In a data management system, the principal functions performed by the data dictionary are:

• Management of data definitions.

• Provision of information for evaluation.

• Support for s/w development.

• Support form documentation.

• Ensuring that the data definitions are flexible & up-to-date.

The most important features are:

• Integrated to a ABAP/4 Development Workbench.

• Active in the runtime environment.


The SAP Data Dictionary is a central repository for the development of Objects, SAP Data Dictionary is used to create and maintain metadata (data definitions) . T-Code for Data Dictionary is SE11.



SQL Can be divided into two parts


DML -- Data Manipulation Language

DDL -- Data Definition Language


Where DML consists of SELECT, INSERT, UPDATE, MODIFY, DELETE etc, this will be handled by ABAP Programs and DDL consists of commands like CREATE TABLE, DROP TABLE, ALTER TABLE, CREATE INDEX etc, this will be handled by Data Dictionary, hence Data Dictionary is the central repository for the development of objects .

Objects Of Data Dictionary are :


Data Base Tables

Views

Data Type

Domains

Type Group

Search Helps

Lock Objects

An ABAP Consultant may need to work on below areas of data dictionary :

Creating Tables

Creating Data elements and Domains

Creating structures and Table types

Creating search helps

Creating Lock objects

Creating data base views


Serkan AKKAVAK

Computer Engineer BSc

SAP Department Deputy Manager

Contact : serkurumsal@yandex.com