select
to_char(to_date(
'2011-11-9
'
,
'yyyy-mm-dd
'
),
'day
'
)
from
dual;
(
3
)指定日期是一年当中的第几周和周几
select
to_char(to_date(
'2011-11-10 '
,
'yyyy-mm-dd '
),
'day-iw '
)
from
dual;
5
、总结
select
to_char(TO_DATE(
'20110101'
,
'YYYYMMDD'
) ,
'yyyyiw'
)
as
week,
--oracle
求
当年的第几周
to_char(TO_DATE(
'20110101'
,
'YYYYMMDD'
) ,
'yyyyww'
)
as
week2,
--oracle
求
当年的第几周