DATA DICTIONARY Cont......

Adding some additional fields to the database tables :

Differences between data base table and structure : 

Syntax of declaring the structure / table in ABAP editor: -

Internal table: -

1. Internal table is the collection of records.
2. Internal tables are temporary tables. That means the data in internal table won’t save any where in SAP.
3. Internal tables are dynamic memory location. That means we no need to provide the size of the internal table.
4. The scope of the internal table is up to that program.
5. 
   Placing the data to the internal table as well as getting the data from internal table is always record by record.

Differences between data base table & internal tables: -

Syntax of declaring the internal table : -

Data <internal table> like table of <work area>.

Syntax of accessing the fields from work area :-

<work area name> - <file name>

Ex: WA – Eid.