FMFKBER_SUBSTRING is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "FM: FunctionalArea Substring work structure" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_FMFKBER_SUBSTRING TYPE FMFKBER_SUBSTRING.
The FMFKBER_SUBSTRING table consists of various fields, each holding specific information or linking keys about FM: FunctionalArea Substring work structure data available in SAP. These include SD1DESC (Description of total substring length), FNSUB1 (Substring 1 of Functional Area), SD1TEXT (Substring Description 1), SD2DESC (Description of total substring length)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .