FSCD_LONG_NAME 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 "Long name" 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_FSCD_LONG_NAME TYPE FSCD_LONG_NAME.
The FSCD_LONG_NAME table consists of various fields, each holding specific information or linking keys about Long name data available in SAP. These include LANGUAGE_CODE (LanguageCode), CONTENT (Content of long name)... 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. .