RBEX is a standard SAP Table which is used to store Persistent Key Figures Header and Item data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The RBEX table consists of various fields, each holding specific information or linking keys about Persistent Key Figures Header and Item data available in SAP. These include MANDT (Client), BELNR (Accounting Document Number), BUZEI (Document Item in Invoice Document), GJAHR (Fiscal Year)... 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. .