在选择子查询中使用“分组依据”

Question

下面是我创建的查询，但在生成结果验证后，查询产生的结果不准确。

select a.acct_id, c.bill_dt 
from account a inner join invoice_detail b on a.acct_id = b.acct_id 
inner join 
    (select acct_id, max(bill_dt) as bill_dt from invoice_detail 
    where bill_dt < '1/1/2014' 
    group by acct_id)c on b.acct_id = c.acct_id 
and a.acct_stat_id = '275' 
and not a.acct_id in (select acct_id from contract where cntrct_stat_id in ('394','554','555','556')) 
and not a.acct_id in (select acct_id from billing_adj where bill_adj_stat_id in ('4','394','553','554','555')) 
group by a.acct_id, c.bill_dt 
order by a.acct_id ASC 

我希望我的结果在满足所有查询条件后仅显示acct_ids和max（bill_dt）。 invoice_detail表包含acct_id的多个记录。但是，当我执行查询时，我随机选择了一个最大（bill_dt）为12/31/2013的acct_id进行验证。我用acct_id查找了invoice_detail表，结果返回了一条bill_dt大于1/1/2014的附加记录。我想确定2014年1月1日后没有任何发票的acct_id。

Answer 1

我想2014年1月1日

然后你在你的子查询条件必须是后确定没有任何发票acct_ids：

HAVING max(bill_dt) < '1/1/2014' 

你也除子查询外，不使用invoice_detail表，因此您可以将其从主查询中取出：

select a.acct_id, c.bill_dt 
from account a 
inner join 
    (select acct_id, max(bill_dt) as bill_dt from invoice_detail 
     group by acct_id 
     HAVING max(bill_dt) < '1/1/2014' 
    ) c on a.acct_id = c.acct_id 
and a.acct_stat_id = '275' 
and not a.acct_id in (select acct_id from contract where cntrct_stat_id in ('394','554','555','556')) 
and not a.acct_id in (select acct_id from billing_adj where bill_adj_stat_id in ('4','394','553','554','555')) 
group by a.acct_id, c.bill_dt 
order by a.acct_id ASC