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SQL Last Weekday Statement

Posted on 2008-06-24
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Last Modified: 2010-07-27
Attached below is my sql query that is working fine.  I would like to add a WHERE clause to show

WHERE a.docdate = 'last weekday'

If today is Monday then I would want it to show all records where a.docdate='Friday'

Any ideas?
select a.sopnumbe, a.custname, a.cstponbr, a.docdate, a.user2ent, b.ponumber from 
(select * from sop10100 where docid = 'WARRANTY') A
left join
(select * from sop60100) B
on a.sopnumbe = b.sopnumbe
group by a.sopnumbe, a.custname, b.ponumber, a.docdate, a.cstponbr, a.user2ent

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Question by:r270ba
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13 Comments
 
LVL 60

Expert Comment

by:chapmandew
ID: 21856770
something like this?  You just want it where the date is Friday?

select a.sopnumbe, a.custname, a.cstponbr, a.docdate, a.user2ent, b.ponumber from
(select * from sop10100 where docid = 'WARRANTY') A
left join
(select * from sop60100) B
on a.sopnumbe = b.sopnumbe
where datename(dw, a.docdate) = 'Friday'
group by a.sopnumbe, a.custname, b.ponumber, a.docdate, a.cstponbr, a.user2ent
0
 

Author Comment

by:r270ba
ID: 21856867
Sorry...I was using Friday as an example.  What I am looking for is the previous weekday.  So, if today is Tuesday it would look for Monday's date.  If today is Monday it would look for Friday's date.  
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Author Comment

by:r270ba
ID: 21856879
Today is 06/24/08 and I would want a.docdate='06/23/08'

Monday was 06/23/08 so I would want a.docdate='06/20/08' (Friday)
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LVL 60

Expert Comment

by:chapmandew
ID: 21856908
OK...try this:

select a.sopnumbe, a.custname, a.cstponbr, a.docdate, a.user2ent, b.ponumber from
(select * from sop10100 where docid = 'WARRANTY') A
left join
(select * from sop60100) B
on a.sopnumbe = b.sopnumbe
where convert(varchar(10), a.docdate , 101) = convert(varchar(10), case when datename(dw, getdate()) = 'Monday' THEN DATEADD(d, -3, getdate()) else dateadd(d, -1, getdate()), 101)
group by a.sopnumbe, a.custname, b.ponumber, a.docdate, a.cstponbr, a.user2ent
0
 

Author Comment

by:r270ba
ID: 21856972
Msg 102, Level 15, State 1, Line 6
Incorrect syntax near ','.

I have check the () and they appear to be correct.  Any ideas?
0
 
LVL 60

Accepted Solution

by:
chapmandew earned 1200 total points
ID: 21857028
sorry about that..try this:

select a.sopnumbe, a.custname, a.cstponbr, a.docdate, a.user2ent, b.ponumber from
(select * from sop10100 where docid = 'WARRANTY') A
left join
(select * from sop60100) B
on a.sopnumbe = b.sopnumbe
where convert(varchar(10), a.docdate , 101) = convert(varchar(10), (case when datename(dw, getdate()) = 'Monday' THEN DATEADD(d, -3, getdate()) else dateadd(d, -1, getdate())end), 101)
group by a.sopnumbe, a.custname, b.ponumber, a.docdate, a.cstponbr, a.user2ent
0
 
LVL 70

Assisted Solution

by:Scott Pletcher
Scott Pletcher earned 800 total points
ID: 21857145
select a.sopnumbe, a.custname, a.cstponbr, a.docdate, a.user2ent, b.ponumber from
(select * from sop10100 where docid = 'WARRANTY' and
    docdate >= dateadd(day, - case datename(weekday, getdate()) when 'monday' then 3 when 'sunday' then 2 else 1 end, convert(char(8), getdate(), 112)) and
    docdate < dateadd(day, - case datename(weekday, getdate()) when 'monday' then 2 when 'sunday' then 1 else 0 end, convert(char(8), getdate(), 112))
) A
left join
(select * from sop60100) B
on a.sopnumbe = b.sopnumbe
group by a.sopnumbe, a.custname, b.ponumber, a.docdate, a.cstponbr, a.user2ent
0
 

Author Comment

by:r270ba
ID: 21857907
Chapmandew...as always...thanks for the expert help!
0
 

Author Comment

by:r270ba
ID: 21857918
I am sorry but I did not realize that ScottPletcher had posted and I selected the last post as the answer thinking it was Chapmandew.  Can I please award the points correctly?
0
 
LVL 60

Expert Comment

by:chapmandew
ID: 21857942
please do.  :)
0
 

Author Comment

by:r270ba
ID: 21858026
I need a mod to reset this post and let me re award the points.  Thanks and sorry!
0
 

Author Comment

by:r270ba
ID: 21858964
I have reqeuested for this to be re-opened.
0
 

Author Closing Comment

by:r270ba
ID: 31470191
Thanks for both of your help.  I gave Chapmandew 300 points because I used his solution but I feel like ScottPletcher actually had a more "defensive" solution by adding the if Sunday clause (even though I only thought about Monday).  I appreciate both of your help!
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