sql server 查询某个时间段共有多少周及每周的日期段

sql 语句

select number+1 as wknum,dateadd(wk,number,\'2017-01-01\') as firstday,
(case when year(dateadd(d,-1,dateadd(wk,number+1,\'2017-01-01\')))>2017 then \'2017-12-31\' 
else dateadd(d,-1,dateadd(wk,number+1,\'2017-01-01\')) end) as sevenday
from master..spt_values
where type=\'p\' and year(dateadd(wk,number,\'2017-01-01\'))=2017

结果如图

 

 

 

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