SELECT to_char(to_date(m.ma_datetime,'yyyy-MM-dd hh24:mi:ss'), 'yyyyMMdd') FROM my_task m; |
m.ma_datetime是varchar2类型的日期格式,先转换date类型
(必须添加时分秒,不然报ora-01830错误)
然后在随心所欲的转换成varchar类型
select a.*,b.*
from FP_JX a left outer join fp_jx_MX b on a.id =b.fpid
where a.fphm ='05444734' or a.fphm ='34157812' or a.fphm ='35982688'
order by a.fphm,a.fpdm