VRQS 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 "Referenced Quantity per SD Document Item" 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_VRQS TYPE VRQS.
The VRQS table consists of various fields, each holding specific information or linking keys about Referenced Quantity per SD Document Item data available in SAP. These include POSNR (Item number of the SD document), ORFMNG (Open reference quantity), FKIMG (Actual Invoiced Quantity), VRKME (Sales unit)... 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. .