COMT_ILH_DB 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 "Database Structure of Relationships in History Table" 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_COMT_ILH_DB TYPE COMT_ILH_DB.
The COMT_ILH_DB table consists of various fields, each holding specific information or linking keys about Database Structure of Relationships in History Table data available in SAP. These include CLIENT (Client), ILGUID (Internal, Unique ID of a Relationship), VALID_TO (Valid To (Time Stamp)), SOURCEGUID (Internal ID for Source in a Relationship)... 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. .