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create table my_table as select 1 as id, date('2020-03-02') as startdate, date('2020-03-02') as enddate union all select 2, date('2020-04-02') as startdate, date('2020-04-02') as enddate union all select 3, date('2020-04-02') as startdate, date('2020-05-02') as enddate union all select 4, date('2020-04-02') as startdate, date('2020-05-02') as enddate union all select 5, date('2020-05-02') as startdate, date('2020-06-02') as enddate union all select 6, date('2020-05-02') as startdate, date('2020-06-02') as enddate union all select 7, date('2020-06-02') as startdate, date('2020-07-02') as enddate
Select ifnull(Tb1.mn,Tb2.mn) As mn, ifnull(count_mn_start,0) As count_mn_start, ifnull(count_mn_end,0) As count_mn_end from (Select Month(StartDate) as mn, count(id) as count_mn_start from my_table Group by Month(StartDate))Tb1 left Join (Select Month(EndDate) as mn, count(id) as count_mn_end from my_table Group by Month(EndDate)) Tb2 on Tb1.mn = Tb2.mn UNION Select ifnull(Tb1.mn,Tb2.mn) As mn, ifnull(count_mn_start,0) As count_mn_start, ifnull(count_mn_end,0) As count_mn_end from (Select Month(StartDate) as mn, count(id) as count_mn_start from my_table Group by Month(StartDate))Tb1 Right Join (Select Month(EndDate) as mn, count(id) as count_mn_end from my_table Group by Month(EndDate)) Tb2 on Tb1.mn = Tb2.mn;
mn
count_mn_start
count_mn_end
3
1
1
4
3
1
5
2
2
6
1
2
7
0
1