INTERNAL TABLES In SAP ABAP

INTERNAL TABLES In SAP ABAP. 

Internal table is an intermediate table. It can hold multiple records at a time. It is a temporary table. The memory for the internal table will be allocated at runtime and de allocated after the execution of the program automatically by the system. The changes that made to the records of internal table are temporary. The changes are not reflected in data base until some DML commands are written. Hence original data is retained in data base. There are three types of internal tables.

Standard Internal Tables

Sorted Internal Tables

Hashed Internal Tables.

There two ways to declare the Internal tables.

Internal Tables with Header line.

Internal tables without Header line.