sql - 使用 Union all 收到错误

Question

select cou_name as County_Name, count(*) as count
from sdrp15_cosd 
where sd_code in (select sd_code from sdrp15_submission_log where QA_DATE IS null)
union all
select cou_name as County_Name, count(*) 
from sdrp15_cosd 
where sd_code in (select sd_code from sdrp15_submission_log where QA_DATE IS not null)
GROUP BY COU_NAME;

我正在尝试查找县名称，对于每个县，我显示链接表显示空或非空连接列的总计数。

我收到错误:

not a single-group function

Answer 1

select cou_name as County_Name, count(*) as count
from sdrp15_cosd 
where sd_code in (select sd_code from sdrp15_submission_log where QA_DATE IS 
null)
GROUP BY COU_NAME 
union all
select cou_name as County_Name, count(*) 
from sdrp15_cosd 
where sd_code in (select sd_code from sdrp15_submission_log where QA_DATE IS     
not null)
GROUP BY COU_NAME;