在QUERY中选择COUNT TROUBLE

Question

嗨，我只需要简单的QUERY - MYSQL FOR MY DASHBOARD。使用线条图和区域图.. enter image description here

Citizentable

1. citizenid
2. citizenencensusyear（censusyeartable的fK）
3. citizengender

censusyeartable

1. censusyearid
   1. censusyear

预期产出：

1. censusyear
2. 男性
3. totalfemale

我几乎无法弄清楚如何获得确切的价值..

CAN ANYBODY可以帮助我

Answer 1

我认为您需要这样的查询：

select  
censusyear,
sum(case CitycenGender when 'Male' then 1 else 0 end) as 'Total Male',
sum(case CitycenGender when 'Female' then 1 else 0 end) as 'Total Male'
from CitycenTable
inner join CensusYearTable on CityCensusYear = CensusYearID

问候。