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SQL Unpivot update if exists else insert

Posted on 2014-12-18
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154 Views
Last Modified: 2014-12-19
The below SQL is working to insert however, I want it to see if the items exists and if they do update them based on the xrefid and the event date for each record.

I am not sure where to begin with this.

;WITH MyCTE AS
(
    SELECT    * 
    FROM      (
                  SELECT   *
                  FROM      emdb.dbo.calendarview 
              )p
    UNPIVOT 
    ( 
        EventDate FOR DateDescription in ([Appraisal Ordered],[Closing Date],[Application Signed],[Appraisal Recieved] ,[Approval To Close],[Insurance Ordered],[Title Ordered])
    ) as unpvt
)

insert into outlookreport.dbo.calendar (eventdate,item,xrefid)
SELECT    
          M.EventDate,
          M.DateDescription,
         
          T.xrefid
FROM      emdb.dbo.calendarview T 

          JOIN MyCTE M
              ON T.xrefid = M.xrefid

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Question by:desiredforsome
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6 Comments
 
LVL 25

Expert Comment

by:chaau
ID: 40507989
If your SQL Server version is indeed 2005 you will need to use two transactions: to UPDATE and to INSERT. If you have at least version 2008 you can use MERGE. Let us know if you want to see how it would be done with the merge
0
 
LVL 25

Expert Comment

by:chaau
ID: 40508008
here is the two transaction version:
-- update first
;WITH MyCTE AS
(
    SELECT    * 
    FROM      (
                  SELECT   *
                  FROM      emdb.dbo.calendarview 
              )p
    UNPIVOT 
    ( 
        EventDate FOR DateDescription in ([Appraisal Ordered],[Closing Date],[Application Signed],[Appraisal Recieved] ,[Approval To Close],[Insurance Ordered],[Title Ordered])
    ) as unpvt
)
UPDATE c SET item = M.DateDescription
FROM emdb.dbo.calendarview T 
          JOIN MyCTE M
              ON T.xrefid = M.xrefid
INNER JOIN outlookreport.dbo.calendar c ON T.eventdate = M.EventDate AND xrefid = T.xrefid;

-- now insert
;WITH MyCTE AS
(
    SELECT    * 
    FROM      (
                  SELECT   *
                  FROM      emdb.dbo.calendarview 
              )p
    UNPIVOT 
    ( 
        EventDate FOR DateDescription in ([Appraisal Ordered],[Closing Date],[Application Signed],[Appraisal Recieved] ,[Approval To Close],[Insurance Ordered],[Title Ordered])
    ) as unpvt
)
insert into outlookreport.dbo.calendar (eventdate,item,xrefid)
SELECT    
          M.EventDate,
          M.DateDescription,
          T.xrefid
FROM      emdb.dbo.calendarview T 
          JOIN MyCTE M
              ON T.xrefid = M.xrefid
WHERE NOT EXISTS(SELECT 1 FROM outlookreport.dbo.calendar WHERE eventdate = M.EventDate AND xrefid = T.xrefid);
                                  

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Author Comment

by:desiredforsome
ID: 40508151
Hmm... I tried to run and it is givbing me an invalid column name for eventdate and xrefid which do exist in the table that is named outlookreport.dbo.calendar so I am trying to troubleshoot but hitting walls.
0
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Author Comment

by:desiredforsome
ID: 40508160
WAit. i think i found the issue jsut trying to correct. Evvent date does not exists in anytable other than outlookreport.dbo.calendar.

However in the code it shows the following

INNER JOIN outlookreport.dbo.calendar c ON T.eventdate = M.EventDate AND xrefid = T.xrefid;

I think the issue is there but trying to figure out the correctiveness.
0
 
LVL 25

Accepted Solution

by:
chaau earned 500 total points
ID: 40508164
Sorry, I have messed up with the aliases. The correct query is:
-- update first
;WITH MyCTE AS
(
    SELECT    * 
    FROM      (
                  SELECT   *
                  FROM      emdb.dbo.calendarview 
              )p
    UNPIVOT 
    ( 
        EventDate FOR DateDescription in ([Appraisal Ordered],[Closing Date],[Application Signed],[Appraisal Recieved] ,[Approval To Close],[Insurance Ordered],[Title Ordered])
    ) as unpvt
)
UPDATE c SET c.item = M.DateDescription
FROM emdb.dbo.calendarview T 
          JOIN MyCTE M
              ON T.xrefid = M.xrefid
INNER JOIN outlookreport.dbo.calendar c ON c.eventdate = M.EventDate AND c.xrefid = T.xrefid;

-- now insert
;WITH MyCTE AS
(
    SELECT    * 
    FROM      (
                  SELECT   *
                  FROM      emdb.dbo.calendarview 
              )p
    UNPIVOT 
    ( 
        EventDate FOR DateDescription in ([Appraisal Ordered],[Closing Date],[Application Signed],[Appraisal Recieved] ,[Approval To Close],[Insurance Ordered],[Title Ordered])
    ) as unpvt
)
insert into outlookreport.dbo.calendar (eventdate,item,xrefid)
SELECT    
          M.EventDate,
          M.DateDescription,
          T.xrefid
FROM      emdb.dbo.calendarview T 
          JOIN MyCTE M
              ON T.xrefid = M.xrefid
WHERE NOT EXISTS(SELECT 1 FROM outlookreport.dbo.calendar WHERE eventdate = M.EventDate AND xrefid = T.xrefid);

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0
 

Author Closing Comment

by:desiredforsome
ID: 40509131
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