从日期小于最大日期的配置单元表中选择

Question

我试图从一个配置单元表中选择*，其中名为TRANS_DATE的日期列say在最大TRANS_DATE的365天之前>=。

select * from TABLE
where (TRANS_DATE > DATE_SUB(max(TRANS_DATE), 365)) and 
        (TRANS_DATE < max(TRANS_DATE));

Answer 1

在子查询中计算max_date并与表交叉联接：

select * 
  from TABLE a
       cross join --cross join with single row
       (select max(TRANS_DATE) as max_trans_date from TABLE) b 
 where (a.TRANS_DATE > DATE_SUB(b.max_trans_date, 365)) 
   and (a.TRANS_DATE < b.max_trans_date);

具有分析功能的：

select a.* from
(select a.*,
       max(TRANS_DATE) over() as max_trans_date 
  from TABLE a) a
 where (a.TRANS_DATE > DATE_SUB(a.max_trans_date, 365)) 
   and (a.TRANS_DATE < a.max_trans_date);