MySQL数据范围从另一个表

Question

获取的开始和结束日期，我在我的数据库中的两个表：

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 | 

我现在用的是接下来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'2017-01-20'和'2018-01-24'被日期表中的startdate和peakdate读取的值所取代，我该怎么办？我还需要显示在Macrocycle表中生成的日期以及它旁边的id，而不是它所做的临时表。请有任何想法吗？

Answer 1

看看下面的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