所以我从我的数据库创建了一个查询,我应该从这里获取 PCS 的最大值,加上名称和类别名称。
这是我尝试的方式,但它给出了错误:( :
select
max(PCS),
NAMESURNAME,
CATEGORYNAME
from
(select
NAMESURNAME,
COUNT(CATEGORYNAME) as PCS,
CATEGORYNAME
from
SALES
group by CATEGORYNAME, NAMESURNAME)
;
感谢您的帮助。 <3
select
max(PCS) as maxPCS,
NAMESURNAME,
CATEGORYNAME
from
(
select
NAMESURNAME,
COUNT(CATEGORYNAME) as PCS,
CATEGORYNAME
from SALES
group by CATEGORYNAME, NAMESURNAME
)d
group by CATEGORYNAME, NAMESURNAME