IFT006 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 "Interface structure for transferring units" 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_IFT006 TYPE IFT006.
The IFT006 table consists of various fields, each holding specific information or linking keys about Interface structure for transferring units data available in SAP. These include DIMID (Dimension key), ZAEHL (Numerator for conversion to SI unit), NENNR (Denominator for conversion into SI unit), ADDKO (Additive constant for conversion to SI unit)... 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. .