CEC06 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 table for compound characteristics" 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_CEC06 TYPE CEC06.
The CEC06 table consists of various fields, each holding specific information or linking keys about Transfer table for compound characteristics data available in SAP. These include POSIT (Item), FIENM (Field Name), LOW (CO-PA characteristic value), FLNOCH (Indicator: No characteristic value exists)... 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. .