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Sql Query

Posted on 2011-03-10
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Last Modified: 2012-05-11
I would like to do a sql that does the following:

Sum the number of days over a non-consecutive date range per emplid.  Here is data example
emplid          start date       end date
9999999      02/01/2010      04/30/2010
9999999      09/08/2009      01/29/2010      
9999999      09/07/2010      12/20/2010      

The query would give the total number of days worke within the date range of
Jan 1 2010 - Dec 31 2010

Any help would be greatly appreciated,

Nigluc
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Comment
Question by:Lucia
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LVL 32

Expert Comment

by:Ephraim Wangoya
ID: 35099452
try

select  emplid, sum(DATEDIFF(DD, [start date], [end date]) [Days Worked]
from table1
where startdate between '01/01/2010' and '12/31/2010'
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LVL 32

Accepted Solution

by:
Ephraim Wangoya earned 2000 total points
ID: 35099463
you need a group by as well

select  emplid, sum(DATEDIFF(DD, [start date], [end date]) [Days Worked]
from table1
where startdate between '01/01/2010' and '12/31/2010'
group by emplid
0
 

Author Comment

by:Lucia
ID: 35108150
Hi ewangoya,

If I run this query, I get the following answer:

SELECT * FROM [TableName] WHERE Date BETWEEN #12/31/1900# AND #12/31/2000# group on emplid, start date , end date

Emplid      start date      end date      DaysWorked
9999999      02/01/2010      30/04/2010      118
9999999      09/07/2010      20/12/2010      164

I still want part of the 3 record that applies to be included... ie

09/07/2010      12/20/2010      

I have to think about this .....

Do you have any ideas.  

Thanks,
Nigluc
I still wanty
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Author Comment

by:Lucia
ID: 35108361
Sorry I meant this record:

9999999      09/08/2009      01/29/2010      

Thanks, Nigluc
0
 

Author Comment

by:Lucia
ID: 35108908
select  
Emplid,
[start date],
[end date],
sum(DATEDIFF("d",[start date], [end date])) as DaysWorked
from table1

WHERE [end date] > #01/01/2010# and
[start date] <  #12/31/2010#

group by emplid,[start date], [end date]



So this will give me all three date ranges but I want only partial number of days in the

9999999      09/08/2009      01/29/201

ie only those that applly to the  Jan 1, 2010.

Is this possible?
0
 
LVL 32

Expert Comment

by:Ephraim Wangoya
ID: 35109151
Your where clause does not seem to be correct

select  
Emplid,
[start date],
[end date],
sum(DATEDIFF("d",[start date], [end date])) as DaysWorked
from table1
WHERE [start date] >= #01/01/2010#
and  [end date] <=  #12/31/2010#
0
 
LVL 32

Expert Comment

by:Ephraim Wangoya
ID: 35109163


select  
Emplid,
[start date],
[end date],
sum(DATEDIFF("d",[start date], [end date])) as DaysWorked
from table1
WHERE [start date] >= #01/01/2010#
and  [end date] <=  #12/31/2010#
group by emplid,[start date], [end date]
0
 

Author Comment

by:Lucia
ID: 35109230
Hi ewangoya,

I still want that third record.  The client still wants to count days that are in date ranges that would sill have the jan 1 -2010  onward.  so for the range in question I would like to see something like  29 days worked instead of 173....

9999999      09/08/2009      01/29/2010    

Thank you,
Nigluc
0
 
LVL 32

Expert Comment

by:Ephraim Wangoya
ID: 35109294
If you want the days worked for each record entry, you dont need the group by


select  
Emplid,
[start date],
[end date],
DATEDIFF(DD,[start date], [end date]) as DaysWorked
from table1
WHERE [start date] >= #01/01/2010#
and  [end date] <=  #12/31/2010#


0
 

Author Comment

by:Lucia
ID: 35110233
Hi  ewangoya,

This worked fine for me:

select  
Emplid,
[start date],
[end date],
SUM ( DATEDIFF("d",
 (CASE WHEN [start date] < '2010-1-1' then '2010-1-1' ELSE [end date] END),
  [end date])) AS DAYS_WORKED
from dbo.days_worked_2
WHERE [end date] > '01/01/2010'
and  [end date] <  '12/31/2010'
and  [start date] < '01/01/2010'
AND EMPLID='4147737'
group by emplid,[start date], [end date]

UNION

select  
Emplid,
[start date],
[end date],
 SUM ( DATEDIFF("d",
 (CASE WHEN [start date] > '2010-1-1' then [start date] ELSE [end date] END),
  [end date])) AS 'DAYS_WORKED'
from dbo.days_worked_2
WHERE [end date] > '01/01/2010'
and  [end date] <  '12/31/2010'
AND [start date] > '01/01/2010'
AND EMPLID='4147737'
group by emplid,[start date], [end date]


Results in :

'4147737'         2009-09-08 00:00:00      2010-01-29 00:00:00      28
'4147737'           2010-02-01 00:00:00      2010-04-30 00:00:00      88
'4147737'      2010-09-07 00:00:00      2010-12-20 00:00:00      104

Thanks for your  help.  

Nigluc
0

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