FCOM_S_COSP_COSS_KEY_FIELDS 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 "Key Fields of CO Totals Tables (Union)" 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_FCOM_S_COSP_COSS_KEY_FIELDS TYPE FCOM_S_COSP_COSS_KEY_FIELDS.
The FCOM_S_COSP_COSS_KEY_FIELDS table consists of various fields, each holding specific information or linking keys about Key Fields of CO Totals Tables (Union) data available in SAP. These include LEDNR (Ledger for Controlling objects), OBJNR (Object number), GJAHR (Fiscal Year), WRTTP (Value Type)... 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. .