BAPI_COLL_PARTNER_KEY 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 "Business Partner Key" 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_BAPI_COLL_PARTNER_KEY TYPE BAPI_COLL_PARTNER_KEY.
The BAPI_COLL_PARTNER_KEY table consists of various fields, each holding specific information or linking keys about Business Partner Key data available in SAP. These include PARTNER_GUID (Business Partner GUID)... 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. .