MAX function

suppose the records in a table containing the records below :

inventbatchid       itemid     a2      a3       a4      PIC3            
PO10901                 AB0001    A       DX      20       c:\photo\abc135.jpg
PO10901                 AB0001    A       DX      20       c:\photo\abc13512321321.jpg
PO10901                 AB0001    A       DX      20       c:\photo\ac135.jpg

In this case, which record will be returned by "MAX" function ? Tks

select inventbatchid,itemid,a2,a3,a4,
 Tent,
 max(case typeid when 'ImgS' then pic else '' end) as 'PIC3',
 max(case typeid when 'sketchA' then pic else '' end) as 'PIC2',
 max(case typeid when 'sketchB' then pic else '' end) as 'PIC1'  
into #tmp3 from #tmp2
AXISHKAsked:
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PortletPaulfreelancerCommented:
without typeid in the data we cannot answer

ie. the case expressions require a value in the field typeid, that value is not provided in your data
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AXISHKAuthor Commented:
TypeID will be either 'IMgS', 'sketchA' and 'sketchB'. In the example above, typeID is 'ImgS'.
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PortletPaulfreelancerCommented:
which record will be returned by "MAX" function ?
c:\photo\ac135.jpg
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AXISHKAuthor Commented:
What's the selection criteria ?
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PortletPaulfreelancerCommented:
The same as text sorting. The c after a is the "biggest" in that location of the 3 strings, so that makes this the maximum
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Scott PletcherSenior DBACommented:
Presumably you'd want each max based on a specific inventbatchid, something like this:


select t2.inventbatchid,t2.itemid,t2.a2,t2.a3,t2.a4,t2.Tent,
    t2_pics.PIC3,t2_pics.PIC2,t2_pics.PIC1
into #tmp3
from #tmp2 t2
inner join (
    select inventbatchid,
        max(case typeid when 'ImgS' then pic else '' end) as 'PIC3',
        max(case typeid when 'sketchA' then pic else '' end) as 'PIC2',
        max(case typeid when 'sketchB' then pic else '' end) as 'PIC1'
    from #tmp2
    group by inventbatchid
) AS t2_pics on
    t2_pics.inventbatchid = t2.inventbatchid
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AXISHKAuthor Commented:
Tks
0
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Microsoft SQL Server 2008

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