SQL：合并复杂表中的行

Question

Let's assume there is a raw data table as below:

Date  |  ID |  Stats
9/12  |  A  |  10
9/13  |  A  |  20
9/13  |  B  |  5
9/14  |  B  |  3
9/15  |  A  |  100
9/16  |  A  |  200
9/17  |  A  |  250

I want to make a new table by SQL query as below from above:

Start_Date  |  End_Date  | ID |  Sum(Stats)
9/12        |  9/13      | A  |  30
9/13        |  9/14      | B  |  8
9/15        |  9/17      | A  |  550

In this case, how can I write SELECT query?

Answer 1

It is working in my tests:

select  
   alias1.DATA,
   alias1.DATA + interval 1 day , 
   alias2.ID, 
   sum(alias2.stats)
from 
   TEST as alias1 inner join 
   TEST as alias2 on (alias2.data >= alias1.data and alias2.data <= alias1.data + interval 1 day)

group by alias1.DATA,alias1.DATA + interval 1 day,alias2.ID