select distinct substring(name,1,1) from stamps ,color_master where color_master.color_code=stamps.color_code and color_master.color='Blue Green' and year(stamps.issue_date)=1964 and stamps.serial_no='0494' order by substring(name,1,1)
IndianPost
Color >> Blue Green >> Issue Date >> year >> 1964 >> Serial Number >> 0494 >> Alpha >> G >>