PCA_CUTAB 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 "Transfer Structure for Existing Currencies/Valuation Methods" 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_PCA_CUTAB TYPE PCA_CUTAB.
The PCA_CUTAB table consists of various fields, each holding specific information or linking keys about Transfer Structure for Existing Currencies/Valuation Methods data available in SAP. These include CURRTYP (Currency Type), VALUTYP (Valuation View), CURR (Local Currency), VAL (Value in local currency)... 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. .