Structures in ABAP

Structure is a skeletal view of a table. It contains the definition of columns and don’t have any contents. Structure is generally a template based on which a table is created. The basic difference between structure and table is that the structure does not exist at the underlying database system level. Structure exists as definition in the dictionary.

Types of Structures

Append Structure:- It will add Fields to the table from last . we can't use that structure in another table. An append structure is a structure assigned to just one table. When a table is activated, all append structures for the table are found and appended to the table.Append structures are used to add customer fields to SAP tables and Custom tables also.

Include Structure: Include structures can used by us to add fields into any ztables and SAP tables also. Because in a Ztable we can add fields where ever we want. Include structure can be used more than one time in a table. The same include structure can be included to any no of custom tables.