CFBSR01 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 "Index table for local calculation (totals)" 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_CFBSR01 TYPE CFBSR01.
The CFBSR01 table consists of various fields, each holding specific information or linking keys about Index table for local calculation (totals) data available in SAP. These include FS (Follow-on record in SAPMKCBR), BFELD (Field no. on B), PM (Plus/minus)... 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. .