IPRQI 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 "Items from a Payment Request (External Interface)" 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_IPRQI TYPE IPRQI.
The IPRQI table consists of various fields, each holding specific information or linking keys about Items from a Payment Request (External Interface) data available in SAP. These include OACIN (Payment sequence and special payment), SAKN2 (Target account), KBLNR_COM (Funds commitment (commitment budget)), KBLPOS_COM (Earmarked Funds: Document Item)... 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. .