PL/SQL 提取不同格式日期之间的差异

Question

这是我正在尝试使用的查询：

select a.cr_mdt_abstractor_dt, b.created,
(trunc(a.CR_MDT_ABSTRACTOR_DT - b.created) || ' days and ' ||<br>
        to_char(to_date('01/01/2000', 'MM-DD-YYYY') + (a.CR_MDT_ABSTRACTOR_DT - b.created),
                'HH24:MI:SS'
               )
       ) as Diff
from CR_MDT a,
CR_MDT_VERIFY b
where a.CR_MDT_ID=b.FK_CR_MDT_ID

我得到的错误是：

ORA-00932: inconsistent datatypes: expected NUMBER got INTERVAL DAY TO SECOND

b.created 列采用日期格式 09-MAR-17 10.52.23.195311 AM(TIMESTAMP) a.cr_mdt_abstractor_dt 的列在日期中。

我能否获得帮助来更正查询，使列 b.created 转换为从 a.cr_mdt_abstractor_dt 中提取的格式？

Answer 1

分别在 CR_MDT_ABSTRACTOR_DT (TIMESTAMP) 和 created 上使用 TRUNC。

SELECT a.cr_mdt_abstractor_dt,
  b.created,
  TRUNC(a.CR_MDT_ABSTRACTOR_DT) - TRUNC(b.created)
  || ' days and '
  || TO_CHAR(to_date('01/01/2000', 'MM-DD-YYYY') + (a.CR_MDT_ABSTRACTOR_DT - b.created), 'HH24:MI:SS' ) AS Diff
FROM CR_MDT a,
  CR_MDT_VERIFY b
WHERE a.CR_MDT_ID=b.FK_CR_MDT_ID;

示例输出：

CREATED       DIFF
07-09-17    -182 days and 12:15:15

PL/SQL 提取不同格式日期之间的差异

PL/SQL Extracting difference between dates in different formats

oracle

plsql

date

extract

date-difference