如何根据日期计算日期范围内特定列中的所有值

Question

我有一个列有列：

ID| rect_id| vieweed_user_id| view_count|view_date
1 | 1      | 1              | 1         |2017-03-07 10:54:21
2 | 1      | 2              | 1         |2017-03-08 01:00:45
3 | 1      | 3              | 1         |2017-03-08 12:54:12

我想根据view_date找到所有view_count值的计数，例如

view_date  | view_count
2017-03-08 |    2
2017-03-07 |    1

但我的问题是我想在指定的日期范围之间找到所有已计算的view_count值，例如

  

2016-03-08至2017-03-08

Answer 1

试试这个。

SELECT view_date, sum(view_count) as total_count FROM TABLE_NAME WHERE view_date >= '2016-03-08' AND view_date <= '2017-03-08' group by view_date

Answer 2

您需要在日期和日期之间进行过滤，以获得所需的输出

select view_date,sum(view_count) from TABLE_NAME where view_date between ('2016-03-08' and '2017-03-08') group by view_date