Question

我的数据库中有两个表：

日期

id | startdate  | peakdate
1  | 2017-07-03 | 2017-05-29

大环

id |  date         | 
1  |  2017-07-03   | 
2  |  2017-07-10   | 
3  |  2017-07-17   |

我使用以下内容为两个日期之间的所有日期生成行：

select a.date 
from (
select curdate() - INTERVAL (a.a + (10 * b.a) + (100 * c.a)) Week as date
from (select 0 as a union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as a
cross join (select 0 as a union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as b
cross join (select 0 as a union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as c
) a
where a.date between '2017-07-03' and '2018-01-24'

如果我希望将'2017-01-20'和'2018-01-24'替换为从日期表中的startdate和peakdate读取的值，我该怎么办？我还需要显示在Macrocycle表中生成的日期，并在其旁边显示id，而不是像现在这样作为临时表。有什么想法吗？

Answer 1

看下面的sql，也许会有所帮助。

select a.date 
from (
select curdate() - INTERVAL (a.a + (10 * b.a) + (100 * c.a)) Week as date
from (select 0 as a union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as a
cross join (select 0 as a union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as b
cross join (select 0 as a union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as c
) a,Dates b
where a.date between b.startdate  and b.peakdate

MySQL数据范围从另一个表中获取开始和结束日期

1 个答案: