Diagram 9: Remove the "Path" Column

• The "path" column is no longer needed

        id,parent_id,"name","nationality","gender","age","income"
        1,,"Alpha","","","",""
        2,1,"Epsilon","","","",""
        3,2,"Kappa","","","",""
        4,1,"Zeta","","","",""
        5,4,"Lambda","","","",""
        6,4,"Mu","","","",""
        7,,"Beta","","","",""
        8,7,"Eta","","","",""
        9,7,"Theta","","","",""
        10,,"Gamma","","","",""
        11,10,"Iota","","","",""
        12,11,"Delta","","","",""
        13,,"Delta","","","",""