使用交叉表和数据透视表

Question

我有一张这样的桌子-

MonthID PlanType    Count

202004  Medicare    1582
202004  Medicaid    6820
201904  Medicare    3875
201904  Other       12598
201905  Other       41817
201905  Medicare    16886
201905  Medicaid    20877

我想使用 pivot 来获得这个输出 -

Month  Medicare  Other  Medicaid 
201905 16886     41817  20877
201904 3875      12598  
202004 1582             6820

Answer 1

您可以使用过滤聚合：

select month, 
       sum(count) filter (where plantype = 'Medicare') as medicare,
       sum(count) filter (where plantype = 'Medicaid') as medicaid,
       sum(count) filter (where plantype = 'Other') as other
from the_table
group by month;