Query to return next 7 dates

Question

Hello,
is there a way to return the next 7 dates just using a query... for example, I need a query that returns:
select (I don't know that put here) from dual
Date
2012-10-05
2012-10-06
2012-10-07
2012-10-08
2012-10-09
2012-10-10
2012-10-11
If possible, I would like to know if there's a way to pass a date and based on it, the query returns the next 7 dates based on the passed date... for example:
select (I don't know that put here) from dual where date > '2012-10-15'
Date
2012-10-16
2012-10-17
2012-10-18
2012-10-19
2012-10-20
2012-10-21
2012-10-22
I really appreciate any help
Thanks

Answer 1

Sven W. wrote:
I don't like connect by. That is fair enough, it is just your opinion.
It is slow and shouldn't be used for real production code.This however, is absolute garbage.
Changing the query to return 10,000 dates takes a little over 1s
SQL> select date '2012-10-15' + level - 1 from dual
  2  connect by level <= 10000;
<snip>
28-FEB-40
29-FEB-40
01-MAR-40
10000 rows selected.
Elapsed: 00:00:01.26>
In your case you can simply do this
with inputdata as (select to_date('2012-10-15','yyyy-mm-dd') startday from dual)
select startday+1 from inputdata union all
select startday+2 from inputdata union all
select startday+3 from inputdata union all
select startday+4 from inputdata union all
select startday+5 from inputdata union all
select startday+6 from inputdata union all
select startday+7 from inputdata ;
Running your alternative for 10,000 dates took quite some time to create, needed to be put in a file to execute and has been running now for about 15 minutes
select date '2012-10-15' + 1 from dual union all
select date '2012-10-15' + 2 from dual union all
<snip>
select date '2012-10-15' + 9996 from dual union all
select date '2012-10-15' + 9997 from dual union all
select date '2012-10-15' + 9998 from dual union all
select date '2012-10-15' + 9999 from dual union all
select date '2012-10-15' + 10000 from dual
;It is much more code, takes more time to write, is proven to be incredibly slow and shouldn't be used for real production code.
Edited by: 3360 on Oct 5, 2012 9:52 AM
Sorry it took only 12 minutes, it seemed a lot longer when waiting for it
29-FEB-40
01-MAR-40
01-MAR-40
02-MAR-40
10000 rows selected.
Elapsed: 00:12:01.35