https://naiwaen.debuggingsoft.com/2014/03/sql-%e0%b8%81%e0%b8%b2%e0%b8%a3%e0%b8%9a%e0%b8%ad%e0%b8%81%e0%b8%a5%e0%b8%b3%e0%b8%94%e0%b8%b1%e0%b8%9a%e0%b8%82%e0%b8%ad%e0%b8%87-record-%e0%b8%88%e0%b8%b2%e0%b8%81%e0%b8%81%e0%b8%b2%e0%b8%a3-selec/