SELECT TO_DATE (2014 || '.09.30', 'yyyy.mm.dd')
- TO_DATE (2104 || '.07.01', 'yyyy.mm.dd')
AS "Wtf",
TO_DATE (2014 || '.09.30', 'yyyy.mm.dd') AS date_to,
TO_DATE (2104 || '.07.01', 'yyyy.mm.dd') AS date_from
FROM DUAL
返回-32781 2014/09/30/ 2104/07/01/
为什么我得到-32781?我期待大约-90 ...
谢谢..