FMADB_HEADER is a standard SAP Table which is used to store Header Information for ADBs data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The FMADB_HEADER table consists of various fields, each holding specific information or linking keys about Header Information for ADBs data available in SAP. These include ADB_ID (ADB_ID: Identifies the ADB Rule), RLDNR (Ledger), BUKRS (Company Code)... 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. .