EVPVL 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 "Period values for percentage of completion (PS EV)" 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_EVPVL TYPE EVPVL.
The EVPVL table consists of various fields, each holding specific information or linking keys about Period values for percentage of completion (PS EV) data available in SAP. These include EVFLD (Field names for progress analysis values (PS)), GJAHR (Fiscal Year), PERIO (Period), FERGR (Percentage of completion)... 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. .