B60ET 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 "Independent reqmts schedule line data for batch-input" 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_B60ET TYPE B60ET.
The B60ET table consists of various fields, each holding specific information or linking keys about Independent reqmts schedule line data for batch-input data available in SAP. These include ENTLU (Period indicator (day, week, month, posting period)), EDATU (Schedule line date), PLNMG (Planned quantity batch input), SERNR (BOM explosion number)... 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. .