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='Gravure process Yellow, red, Blue & Black' order by substring(name,1,1)
IndianPost
Currency >> P >> Color >> Gravure process Yellow, red, Blue & Black >> Alpha >> S >>