Improve company productivity with a Business Account.Sign Up

x
?
Solved

SQL Max and Min date for prev month

Posted on 2012-03-12
14
Medium Priority
?
478 Views
Last Modified: 2012-03-16
Hi experts.

Not sure is this is possible but im creating a view to pull data for the previous month. I need the WHERE clause to have the Min date of the first day of perv month and the Max date to be last day of the previous month.

Example:

Current Date:  2012-03-12

WHERE Date Between '2012-02-01 AND '2012-02-29'

Thanks,
Dean
0
Comment
Question by:deanlee17
  • 5
  • 5
  • 3
  • +1
14 Comments
 
LVL 37

Expert Comment

by:momi_sabag
ID: 37710620
try

where date between
 dateadd(month, -1,
   dateadd(dd, -1 * datepart(dd, getdate()) + 1, getdate())
)
and
   dateadd(dd, -1 * datepart(dd, getdate()) , getdate())
0
 
LVL 35

Expert Comment

by:YZlat
ID: 37710980
WHERE MyDate BETWEEN DATEADD(dd,-(DAY(DATEADD(mm,1,GETDATE()))-1),DATEADD(mm,-1,GETDATE()))
AND DATEADD(dd, -DAY(DATEADD(m,1,GETDATE())), DATEADD(m,0,GETDATE()))
0
 
LVL 75

Expert Comment

by:Anthony Perkins
ID: 37712803
If you do not want the time in the condition and you are not using SQL Server 2008 then consider this small variation (no points please):

DECLARE @Today smalldatetime
SET @Today = DATEADD(day, 0, DATEDIFF(DAY, 0, GETDATE()))

...

WHERE Date BETWEN DATEADD(day, 1 - DAY(DATEADD(MONTH, -1, @Today)), DATEADD(MONTH, -1, @Today)) AND DATEADD(DAY, -DAY(@Today), @Today)

Open in new window

0
A proven path to a career in data science

At Springboard, we know how to get you a job in data science. With Springboard’s Data Science Career Track, you’ll master data science  with a curriculum built by industry experts. You’ll work on real projects, and get 1-on-1 mentorship from a data scientist.

 

Author Comment

by:deanlee17
ID: 37718730
acperkins: Could you explain exactly how... these lines work....

= DATEADD(day, 0, DATEDIFF(DAY, 0, GETDATE()))

BETWEN DATEADD(day, 1 - DAY(DATEADD(MONTH, -1, @Today)), DATEADD(MONTH, -1, @Today)) AND DATEADD(DAY, -DAY(@Today), @Today)

Thanks.
0
 

Author Comment

by:deanlee17
ID: 37718779
momi_sabag:

This worked perfectly. Can you explain exactly how is works?

Thanks,
Dean.
0
 
LVL 37

Expert Comment

by:momi_sabag
ID: 37720169
sure
dateadd(dd, -1 * datepart(dd, getdate()) + 1,  -- this returns the first day of the current month by subtracting the number of days that have passed since the month started

wrapping it with
 dateadd(month, -1,
 getdate())
)
will return the first day of last month

and
   dateadd(dd, -1 * datepart(dd, getdate()) , getdate()) -- this returns the last day of the previous month
0
 

Author Comment

by:deanlee17
ID: 37720232
momi_sabag, ive found a problem, it doesnt bring back results for 1st Feb only 2nd feb onwards?!

Thanks,
Dean
0
 
LVL 37

Expert Comment

by:momi_sabag
ID: 37720269
what exactly did you execute?
0
 
LVL 75

Expert Comment

by:Anthony Perkins
ID: 37721621
it doesnt bring back results for 1st Feb only 2nd feb onwards?!
Now hopefully you see what I meant by "If you do not want the time in the condition"
0
 
LVL 75

Expert Comment

by:Anthony Perkins
ID: 37721634
Could you explain exactly how... these lines work....
See if this helps:
DECLARE @Today smalldatetime
SET @Today = DATEADD(day, 0, DATEDIFF(DAY, 0, GETDATE()))

SELECT	DATEADD(day, 1 - DAY(DATEADD(MONTH, -1, @Today)), DATEADD(MONTH, -1, @Today)), 
	DATEADD(DAY, -DAY(@Today), @Today)

Open in new window


Incidentally, there was a typo in the solution i posted earlier this:
WHERE Date BETWEN DATEADD(day, 1 - DAY(DATEADD(MONTH, -1, @Today)), DATEADD(MONTH, -1, @Today)) AND DATEADD(DAY, -DAY(@Today), @Today)

Should have read:
WHERE Date BETWEEN DATEADD(day, 1 - DAY(DATEADD(MONTH, -1, @Today)), DATEADD(MONTH, -1, @Today)) AND DATEADD(DAY, -DAY(@Today), @Today)
0
 

Author Comment

by:deanlee17
ID: 37722312
Hi acperkins

Thanks for the reply, but I am using SQL Server 2008, will this cause a problem?

Thanks,
Dean.
0
 
LVL 75

Accepted Solution

by:
Anthony Perkins earned 2000 total points
ID: 37722373
No, but with SQL Server 2008 you can use the new date data type and just do:

WHERE [Date] BETWEEN DATEADD(day, 1 - DAY(DATEADD(MONTH, -1, CAST(GETDATE() AS date))), DATEADD(MONTH, -1,CAST(GETDATE() AS date)))
      AND DATEADD(DAY, -DAY(CAST(GETDATE() AS date)), CAST(GETDATE() AS date))
0
 

Author Comment

by:deanlee17
ID: 37723818
acperkins, that worked perfectly. Can you explain where why momi_sabag's method failed as opposed to yours?
0
 
LVL 75

Expert Comment

by:Anthony Perkins
ID: 37726057
>>Can you explain where why momi_sabag's method failed as opposed to yours?<<
As I mentioned previously, the only difference between the two is the time.  See for yourself:
SELECT dateadd(month, -1,   dateadd(dd, -1 * datepart(dd, getdate()) + 1, getdate())),
   dateadd(dd, -1 * datepart(dd, getdate()) , getdate())
   
SELECT DATEADD(day, 1 - DAY(DATEADD(MONTH, -1, CAST(GETDATE() AS date))), DATEADD(MONTH, -1,CAST(GETDATE() AS date))),
       DATEADD(DAY, -DAY(CAST(GETDATE() AS date)), CAST(GETDATE() AS date))

That tell me that your date column includes a time.
0

Featured Post

What Kind of Coding Program is Right for You?

There are many ways to learn to code these days. From coding bootcamps like Flatiron School to online courses to totally free beginner resources. The best way to learn to code depends on many factors, but the most important one is you. See what course is best for you.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

This month, Experts Exchange sat down with resident SQL expert, Jim Horn, for an in-depth look into the makings of a successful career in SQL.
Microsoft provides a rich set of technologies for High Availability and Disaster Recovery solutions.
Via a live example, show how to extract insert data into a SQL Server database table using the Import/Export option and Bulk Insert.
Via a live example, show how to backup a database, simulate a failure backup the tail of the database transaction log and perform the restore.

608 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question