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/*以当前时间为准，取前三个小时后两个小时的分钟枚举*/
with x as(
select 开始时间+level * 1/24/60 as 分钟
from (select sysdate+2/24 as 结束时间,sysdate-3/24 as 开始时间
from dual)
connect by level <= 300
)
select to_char(分钟,'yyyy-mm-dd hh24:mi')||':00' as 时间枚举 from x
