Question

我是sql的实习生，对此查询的任何帮助都会很棒.TIA。

    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

如果您正在讨论命令行程序，这将有效。

puts "Hello World"

或者如果你想要一个面向对象的版本

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

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

如果您正在寻找Hello World上的ruby on rails版本。查看Rails的入门Guide。

列出每个部门中最近雇用的员工

1 个答案: