知道下面的SQL代码在做什么

以下代码的作用是什么

Declare  @StartDate datetime;       -- figure    
Declare  @EndDate datetime;         -- figure

Declare @CurrentDate datetime

Set @CurrentDate = @StartDate

While @CurrentDate <= @EndDate
Begin
    Insert Into dbo.Tbl_Time_Dimension 
    Values (@CurrentDate, 
            year(@CurrentDate),    
            datepart(Quarter, @CurrentDate),    
            month(@CurrentDate),
            datepart(week, @CurrentDate),       
            day(@CurrentDate))

    Select @CurrentDate = DateAdd(dd, 1, @CurrentDate)
End

Declare@StartDate-datetime；——身材
声明@EndDate datetime；——图形
声明@CurrentDate日期时间
设置@CurrentDate=@StartDate
@CurrentDate此查询获取两个日期
对于startdate和enddate之间的每一天，将该日期插入Tbl_Time_维度以及它的月、周、日和季度，该代码将从@startdate迭代到@enddate，并将一行插入名为Tbl_Time_维度的表中

保存到此表中的字段是：日期范围内每个日期的日期、年、季度、月、周和日

Declare @StartDate datetime; --figure
Declare @EndDate datetime; --figure

Declare @CurrentDate datetime 

-- Starts the iterator on @StartDate
Set @CurrentDate=@StartDate 

-- Iterates until @EndDate
While @CurrentDate<=@EndDate 
Begin 

    -- Saves data in table
    Insert Into dbo.Tbl_Time_Dimension 
    Values (@CurrentDate, year(@CurrentDate),
            datepart(Quarter,@CurrentDate),
            month(@CurrentDate), 
            datepart(week,@CurrentDate),
            day(@CurrentDate)) 

    -- Increments the date by 1 day
    Select @CurrentDate=DateAdd(dd,1,@CurrentDate) 
End

Declare@StartDate-datetime--图形
声明@EndDate-datetime--图形
声明@CurrentDate日期时间
--在@StartDate上启动迭代器
设置@CurrentDate=@StartDate
--迭代到@EndDate
而@CurrentDate