mysql分类统计cash when then

SELECT 
    name as '小区名称',
    sum(case when location='inner' then 1 else 0 end) AS '小区内',
    sum(case when location='door' then 1 else 0 end) AS '小区门口', 
    sum(case when location='street' then 1 else 0 end) AS '街道旁',
    round(sum(case when location='inner' then 1 else 0 end)/(SELECT count(*) FROM v_shop_community)*100,1) AS '小区内%',
    round(sum(case when location='door' then 1 else 0 end)/(SELECT count(*) FROM v_shop_community)*100,1) AS '小区门口%',
    round(sum(case when location='street' then 1 else 0 end)/(SELECT count(*) FROM v_shop_community)*100,1) AS '街道旁%'
from v_shop_community group by name;