CKI_W2A_ML 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 "Settlement fields (already closed) in second ledger currency" 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_W2A_ML TYPE CKI_W2A_ML.
The CKI_W2A_ML table consists of various fields, each holding specific information or linking keys about Settlement fields (already closed) in second ledger currency data available in SAP. These include ZUABW_2A (Receipts: Single-level price differences), ZUUMB_2A (Revaluation Amount), VNPRD_2A (1-Level Price Differences from Issues not Affecting the Pric), VPPRD_2A (Other receipts/issues: Single-level price differences)... 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. .