CKML3 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 "Material ledger period totals record (from Release 4.0)" 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_CKML3 TYPE CKML3.
The CKML3 table consists of various fields, each holding specific information or linking keys about Material ledger period totals record (from Release 4.0) data available in SAP. These include KALNR (Cost Estimate Number for Cost Est. w/o Qty Structure), MATLED (Material ledger type), BDATJ (Posting Date YYYY), POPER (Posting period)... 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. .