What is an ABAP dictionary?
ABAP dictionary is a central data management system. Its main function is to support the creation and management of data definitions.
What are the basic objects of the data dictionary?
- Tables
- Domains
- Data elements
- Structures
- Foreign keys
What is the difference between Data elements and Domains?
| Data Element | Domain |
| Data Element gives semantic attributes like field labels and online documentation | Domain gives the technical attributes like data type and field length |
Can you delete a domain which is being used by data elements?
No
Can you define a field without a data element?
Yes. Use the path Utilities – > Direct Entry Type
What are the difference between Tables and Structures?
| Table | Structure |
| Table has an underlying database table | No underlying database table |
| Table has a primary key | No primary key |
| Table has technical attributes | No technical attributes |
What is a Data Class?
The Data class determines in which table space the table is stored when it is created in the database.
What is a Size Category?
The Size category describes the probable space requirement of the table in the database.
What is a view?
A view is a logical view on one or more tables. i.e. the data from a view is not actually physically stored in the database instead the data will be derived from one or more tables during runtime.
What are the different types of views and their definition?
- Database View
- Help View
- Projection View
- Maintenance View
WT IS FOREIGN KEY?
its combining two different tables
Foreign key a field of transaction table which is also a primary (unique) key in the master table.