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我想只能选择一个总结列总和(MAX())子查询
select rental.member_id,
rental.rental_id,
sum(rental_line.Qty) as TotalRentals
from Rental
INNER JOIN rental_line
on rental.rental_id =rental_line.rental_id
where MONTHS_BETWEEN(sysdate, datein)<(12)
group by rental.member_id,
rental.rental_id,
SUM(TotalRentals) = MAX(SUM(TotalRentals));
任何想法的最大价值?
哇,一个可行的治疗三江源! 如果我想添加从Member表中内联的成员FName和SName列。 我只是将字段添加到选择和分组的部分? – WibblyWobbly
@ user1860423试试吧。不要忘了'group by'子句:) –
试过添加额外的字段,但是我收到了与无效标识符有关的错误,即使成员表包含正确的字段? 选择member_id ,member.FNAME ,member.SName ,rental_id ,从TotalRentals (选择rental.member_id ,rental.rental_id ,总和(rental_line.Qty)作为TotalRentals 从租赁 \t INNER JOIN上构件 \t rental.Member_ID = Member.Member_ID – WibblyWobbly