CSKR_EX 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 "Resources: Maintainable fields" 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_CSKR_EX TYPE CSKR_EX.
The CSKR_EX table consists of various fields, each holding specific information or linking keys about Resources: Maintainable fields data available in SAP. These include MANDT (Client), KOKRS (Controlling Area), RESRC (Resource), DATBI (Valid To Date)... 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. .