ATPPC 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 "ATP Server: Partial Confirmation Data at Schedule Line Level" 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_ATPPC TYPE ATPPC.
The ATPPC table consists of various fields, each holding specific information or linking keys about ATP Server: Partial Confirmation Data at Schedule Line Level data available in SAP. These include BSFAK (ATP Server: confirmation factor), BDCNT (5 Character Numeric NUMC), DAT00 (Requirements date), MNG01 (Requirement quantity for availability check)... 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. .