查找總計按周

Question

我有一個表table列date和total。

如何在過去的20周內將total列的sum列逐列彙總到sysdate？

Answer 1

select trunc(date,'D'), sum(total) 
from table 
where date >= trunc(sysdate - 20*7, 'D') 
group by trunc(date,'D') 
order by 1 

Answer 2

SELECT *, CONCAT(YEAR(`sysdate`), '/', WEEK(`sysdate`)) AS `year_week` 
FROM `table` 
GROUP BY `year_week` 
ORDER BY `year_week` DESC 
LIMIT 20;