如何为以下方案构建SQL查询？

Question

我有一个表，看起来像这样：

Name Post  Like Share Comment Date 
-------------------------------------------- 
Sita test data 1 5 2 4 28/4/2015 
Munni test data 2 5 2 5 27/4/2015 
Shila test data 3 1 3 1 22/4/2015 
Ram  Test data 4 5 0 5 1/4/2015 
Sam  Test data 5 4 0 2 2/4/2015 
Jadu Test data 6 1 5 2 30/3/2015 
Madhu Test data 7 5 0 4 10/4/2015 

现在我想我的结果集是这样的：

Type   Name  Post  Like Share Comment Date 
------------------------------------------------------------------------- 
Today   Sita test data 1 5 2 4  28/4/2015 
Last 7 Days  Sita test data 1 5 2 4  28/4/2015 
Last 7 Days  Munni test data 2 5 2 5  27/4/2015 
Last 7 Days  Shila test data 3 1 3 1  22/4/2015 
Last 30 Days Sita test data 1 5 2 4  28/4/2015 
Last 30 Days Munni test data 2 5 2 5  27/4/2015 
Last 30 Days Shila test data 3 1 3 1  22/4/2015 
Last 30 Days Ram  Test data 4 5 0 5  1/4/2015 
Last 30 Days Sam  Test data 5 4 0 2  2/4/2015 
Last 30 Days Jadu Test data 6 1 5 2  30/3/2015 
Last 30 Days Madhu Test data 7 5 0 4  10/4/2015 

今天只能有今天的文章。过去7天内必须有今天的帖子+过去7天的帖子。过去30天的专栏必须包含过去30天的所有信息。

Answer 1

有几个工会与不同的案件陈述来获得日期范围将工作。

Answer 2

使用union all和dateadd：

select 'Today' as Type, Name, Post, [Like], Share, Comment, [Date] 
from yourtable 
where [Date] = getdate() 
union all 
select 'Last 7 Days' as Type, Name, Post, [Like], Share, Comment, [Date] 
from yourtable 
where [Date] >= DateAdd(day,-7,getdate()) 
union all 
select 'Last 30 Days' as Type, Name, Post, [Like], Share, Comment, [Date] 
from yourtable 
where [Date] >= DateAdd(day,-30,getdate()) 

BTW，对列名可怕的选择（不使用保留字）。