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Create Table table_name([date] DATE, [count] INT); Insert Into table_name Values('2022-12-04',1), ('2022-12-03',2), ('2022-12-02',1), ('2022-12-01',3), ('2022-11-30',1), ('2022-11-29',1), ('2022-11-28',1), ('2022-11-27',2);
8 rows affected
with check_date as ( select case when Day([date])=1 Then Cast([date] as varchar(10)) else Format([date], 'yyyy-MM') end As dt, [count] from table_name ) select dt, sum([count]) as count_sum from check_date group by dt order by dt desc
dt
count_sum
2022-12-01
3
2022-12
4
2022-11
5