这是基本语法：
select a.Date
from (select date('Now', '-'||(a.a + (10 * b.a) + (100 * c.a))|| ' days') 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
) 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
) 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
) c
) a;
我忽略了该where子句，因为这些日期是过去1000多个日期，因此他们无论如何都不会选择任何内容。
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