 Parallel group study design was chosen. In order maintain the practicality of the phase IV study, open label design of study drug delivery was chosen. The reading of the DXA scans will be conducted by one expert in blinded manner. Glimepiride is the most frequently used SUs in Korea and therefore this was chosen as comparator.Dapagliflozin treatment will be associated with reduction of total body FM, BW, abdominal VAT and SAT volume compared with glimepiride. 