SPDE1 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 "Partner-Customer relationship" 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_SPDE1 TYPE SPDE1.
The SPDE1 table consists of various fields, each holding specific information or linking keys about Partner-Customer relationship data available in SAP. These include PARTNR (Partner number), ADRNR (Address number), ADRTYP (Type of partner address), NUMKR (Number range)... 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. .