按多种条件计算

Question

这是我的数据,我需要以最快的方式获得结果.

Answer 1

标准条件聚合:

select city,
       sum(case when active = 'true' then 1 else 0 end) active,
       sum(case when blacklist = 'true' then 1 else 0 end) blacklist,
       sum(case when license = 'true' then 1 else 0 end) license,
       sum(case when married = 'true' then 1 else 0 end) married
from TableName
group by city