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Developer-C 11.1
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declare @dt_start date = '2020-07-10'; declare @dt_end date = '2020-09-10'; with cte as ( select datefromparts(year(@dt_start), month(@dt_start), 1) month_start, 1 - day(@dt_start) + day( case when @dt_end > eomonth(@dt_start) then eomonth(@dt_start) else @dt_end end ) as no_days union all select dateadd(month, 1, month_start), case when @dt_end > dateadd(month, 2, month_start) then day(eomonth(dateadd(month, 1, month_start))) else day(@dt_end) end from cte where dateadd(month, 1, month_start) <= @dt_end ) select * from cte
month_start
no_days
2020-07-01
22
2020-08-01
31
2020-09-01
10