AMPKR 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 "Help Fields for SAPMMPKR Control Cycle Definition" 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_AMPKR TYPE AMPKR.
The AMPKR table consists of various fields, each holding specific information or linking keys about Help Fields for SAPMMPKR Control Cycle Definition data available in SAP. These include ICDN1 (Number of the following screen), FLG01 (Checkbox), AEN01 (Change indicator), AENPS (Change indicator)... 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. .