This is personal study note Copyright and original reference: https://www.youtube.com/watch?v=c7o4ygOnP1M&list=PLuHgQVnccGMDF6rHsY9qMuJMd295Yk4sa ================================================================================ ER master: ermaster.sourceforge.net ================================================================================ ================================================================================ create 3 tables ================================================================================ Start to make table detailed from the table which doesn't have FK physical name: table name in DB logical name: helper name ================================================================================ add other column ================================================================================ author table has been created ================================================================================ topic and comment tables have been created