CKI_KOSTH 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 "Cost origin" 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_CKI_KOSTH TYPE CKI_KOSTH.
The CKI_KOSTH table consists of various fields, each holding specific information or linking keys about Cost origin data available in SAP. These include KALNR (Cost Estimate Number for Cost Est. w/o Qty Structure), CURTP (Currency Type and Valuation View), DELTA (Type of Variance), BWKEY (Valuation Area)... 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. .