GRAC_S_REQUSER 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 "Structure for Req User" 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_GRAC_S_REQUSER TYPE GRAC_S_REQUSER.
The GRAC_S_REQUSER table consists of various fields, each holding specific information or linking keys about Structure for Req User data available in SAP. These include USERID (User ID), FNAME (First Name), LNAME (Last Name), PROVUSER (User ID)... 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. .