查询 START_DATE 比 END_DATE 大 1 天

Question

I have a table where i have two columns START_DATE and END_DATE. I need to find out all the records where start date is 1 day greater than end date.

Answer 1

select *
  from myTable
 where end_date = start_date + 1

will show you all the rows where end_date is exactly 1 day later than start_date .

Be aware that Oracle date columns always have a day and a time component, though, even if your front end isn't showing the time component. If end_date and start_date always have a time component of midnight, they might be exactly 1 day apart. If they have actual times, though, it is very unlikely that they would be exactly 1 day apart. If you really want to see all rows where the day component differs by a day, ignoring the time component

select *
  from myTable
 where trunc(end_date) = trunc(start_date) + 1