FMCU_S_ACTIVECOMB 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 "Structure for active combination" 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_FMCU_S_ACTIVECOMB TYPE FMCU_S_ACTIVECOMB.
The FMCU_S_ACTIVECOMB table consists of various fields, each holding specific information or linking keys about Structure for active combination data available in SAP. These include BUDCAT (Budget Category), FUND (Fund), FISCYEAR (Fiscal Year), PROCESS (Internal Budgeting Process)... 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. .