CIF_E1DATEM 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 "Master key date and change number" 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_CIF_E1DATEM TYPE CIF_E1DATEM.
The CIF_E1DATEM table consists of various fields, each holding specific information or linking keys about Master key date and change number data available in SAP. These include MSGFN (Function), KEY_DATE (System Date), AENNR (Change Number), EFFECTIVITY ()... 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. .