选择一个月的每日修订小时值

Question

我有两个查询第一个返回一个月的每个日期的最新修订号

select  max(a.wdcm_revision_no)
from wb_declared_capacity_master a, wb_declared_capacity_det_unit b
where a.wdcm_internal_id = b.wdcd_ref_id and b.wdcm_unit = 'HSY_Unit1' and to_char(a.wdcm_date,'MM YYYY')='08 2019' group by a.wdcm_date

以及第二个查询，它返回所有数据，而不考虑任何修订版

select a1.wdcm_date, b1.wdcd_block_no, c1.wdcd_capacity, c1.wdcd_approval, a1.wdcm_revision_no
from wb_declared_capacity_master a1, wb_declared_capacity_det_unit b1, wb_declared_capacity_detail c1
where a1.wdcm_internal_id = b1.wdcd_ref_id and a1.wdcm_internal_id = c1.wdcd_ref_id and b1.wdcm_unit = 'HSY_Unit1' and to_char(a1.wdcm_date,'MM YYYY')='08 2019'and b1.wdcd_block_no = c1.wdcd_block_no

现在，我想从第一个查询传递每个日期的最新修订版，其中第二个查询的条件希望根据这些最新修订版号返回所有值

Answer 1

您可以将其合并为1个查询。第一个成为CTE，然后被送入第二个。我相信下面的内容很接近，但是由于您并未真正指出要“传递结果”的位置，因此我做出的假设似乎很可能，但这仍然是一个假设。

with latest (revision) as
-- first query
    ( select max(a.wdcm_revision_no) 
        from wb_declared_capacity_master a
           , wb_declared_capacity_det_unit b
        where a.wdcm_internal_id = b.wdcd_ref_id 
          and b.wdcm_unit = 'HSY_Unit1' 
          and to_char(a.wdcm_date,'MM YYYY')='08 2019' 
        group by a.wdcm_date
    )
-- And second query which returns all the data irrespective of any revision
select a1.wdcm_date
     , b1.wdcd_block_no
     , c1.wdcd_capacity
     , c1.wdcd_approval
     , a1.wdcm_revision_no
  from wb_declared_capacity_master   a1
     , wb_declared_capacity_det_unit b1
     , wb_declared_capacity_detail   c1   
     , latest
 where a1.wdcm_internal_id = b1.wdcd_ref_id 
   and a1.wdcm_internal_id = c1.wdcd_ref_id 
   and b1.wdcm_unit = 'HSY_Unit1' 
   and to_char(a1.wdcm_date,'MM YYYY')='08 2019'
   and b1.wdcd_block_no = c1.wdcd_block_no 
   and a1.wdcm_revision_no = latest.revision;    ---- you didn't actually say where to "pass it in" this seems likely

我保留了您使用的联接格式，但实际上您应该开始使用现代ANSI / ISO标准联接格式。 （现代意义仅在1992年左右才出现）。