FMYC_CFPARAMETER_KEY 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 for Carryover Rules in FM" 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_FMYC_CFPARAMETER_KEY TYPE FMYC_CFPARAMETER_KEY.
The FMYC_CFPARAMETER_KEY table consists of various fields, each holding specific information or linking keys about Key for Carryover Rules in FM data available in SAP. These include GJAHR (Fiscal Year), WRTTP (Value Type), RLDNR (Ledger), PROCESS (FM Closing Operations)... 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. .