select distinct substring(name,1,1) from stamps ,color_master,np_master where np_master.np_code=stamps.np_code and np_master.np='P' and color_master.color_code=stamps.color_code and color_master.color='Turquoise Blue' and stamps.serial_no='0591' order by substring(name,1,1)
IndianPost
Currency >> P >> Color >> Turquoise Blue >> Serial Number >> 0591 >> Alpha >> A >>