列出每個部門中最近僱傭的員工

Question

我是一名sql實習生，對此查詢有任何幫助，都會很棒。

select distinct jobtitle,max([HireDate]),LoginID from [HumanResources].[Employee] as e 
where loginid in (select distinct LoginID from HumanResources.Employee 
       where JobTitle in (select distinct JobTitle from [HumanResources].[Employee])) 
group by JobTitle,LoginID; 

Answer 1

如果你正在談論一個命令行程序，這將工作。

puts "Hello World" 

，或者如果你想要一個面向對象的版本

class HelloWorld 
    def initialize(name) 
     @name = name.capitalize 
    end 
    def sayHi 
     puts "Hello #{@name}!" 
    end 
end 

hello = HelloWorld.new("World") 
hello.sayHi 

如果您正在尋找在軌道上版的Hello World的紅寶石。檢查Rails的入門指南Guide。