STRU_CALC_DATE 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 Date and Date Reference" 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_STRU_CALC_DATE TYPE STRU_CALC_DATE.
The STRU_CALC_DATE table consists of various fields, each holding specific information or linking keys about Structure for Date and Date Reference data available in SAP. These include DATE_TYPE (Key date reference)... 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. .