SAP ABAP Problems & Solution

What is data dictionary in sap? SAP data dictionary is central repository for the development of object, SAP data dictionary is used to create & maintain metadata. SQL can be divided by two parts: DML - Data Manipulation language consist of SELECT ,INSERT, UPDATE, MODIFY, DELETE etc. DDL - Data Definition language consist of CREATE TABLE, DROP TABLE, ALTER TABLE, CREATE INDEX etc. Data Dictionaries function : Database tables. views Data Elements Domains Structures Search Helps Lock Objects T-Code is : SE11