Left outer join with TOP 1 Select

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Left outer join with TOP 1 Select

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Topic

rtown
Yak Posting Veteran

53 Posts

Posted - 2013-11-04 : 19:56:42

Hello all,
This command is becoming a behemoth. I just need to add one more thing, and I am unsure how to do it because of the TOP 1 requirement.

I want to add this select:


SELECT TOP 1 ShopComments.cpid, ShopComments.drawingid, ShopComments.shopcomment WHERE ShopComments.drawingid = Drawings.ID ORDER BY ShopComments.cpid ASC

To this command, as a left outer join. Meaning there may be no records but I still want the primary data.


SELECT
Drawings.ID, Drawings.Job, Drawings.Series, Drawings.Returned, Drawings.Description, Drawings.Revision, Drawings.Status, Drawings.ShopRevision, Drawings.DrawingFilename, Drawings.DwgDue, Drawings.DSaw, Drawings.DRobotics, Drawings.DOrdered, Drawings.DShopStatus, Drawings.DEstHours, Drawings.DRush, Drawings.ShopComments,
Jobs.ID AS jobid, Jobs.Quote, Jobs.Job, Jobs.Customer, Jobs.JobName, Jobs.Active, Jobs.NDT, Jobs.Inspection,
Python.PJob, Python.PSeries, Python.Completed
FROM Drawings
INNER JOIN Jobs ON Drawings.Job = Jobs.Job
LEFT OUTER JOIN Python ON Python.PJob = Drawings.Job AND Python.PSeries = Drawings.Series
WHERE Drawings.Status='Shop Issued' AND Jobs.Active='True' AND Drawings.DOrdered='Yes' AND DShopStatus IS NULL
OR Drawings.Status='Shop Issued' AND Jobs.Active='True' AND Drawings.DOrdered='Yes' AND DShopStatus='Awaiting Production
ORDER BY CONVERT(Date, DwgDue, 103) ASC

Wow, I hope that makes sense. Any advice appreciated. I looked all over for some info, and found some on OUTER APPLY but this didn't yield any results...
Thanks!

VeeranjaneyuluAnnapureddy
Posting Yak Master

169 Posts

Posted - 2013-11-04 : 22:56:20

SELECT Drawings.ID
, Drawings.Job
, Drawings.Series
, Drawings.Returned
, Drawings.Description
, Drawings.Revision
, Drawings.Status
, Drawings.ShopRevision
, Drawings.DrawingFilename
, Drawings.DwgDue
, Drawings.DSaw
, Drawings.DRobotics
, Drawings.DOrdered
, Drawings.DShopStatus
, Drawings.DEstHours
, Drawings.DRush
, Drawings.ShopComments
, Jobs.ID AS jobid
, Jobs.Quote
, Jobs.Job
, Jobs.Customer
, Jobs.JobName
, Jobs.Active
, Jobs.NDT
, Jobs.Inspection
, Python.PJob
, Python.PSeries
, Python.Completed
FROM Drawings
INNER JOIN Jobs ON Drawings.Job = Jobs.Job
LEFT OUTER JOIN Python ON Python.PJob = Drawings.Job AND Python.PSeries = Drawings.Series
WHERE Drawings.Status='Shop Issued' AND Jobs.Active='True' AND Drawings.DOrdered='Yes' AND DShopStatus IS NULL
OR DShopStatus='Awaiting Production'
ORDER BY CONVERT(Date, DwgDue, 103) ASC

veeranjaneyulu

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2013-11-05 : 00:40:55

as per your explanation you need OUTER APPLY only


SELECT
Drawings.ID, Drawings.Job, Drawings.Series, Drawings.Returned, Drawings.Description, Drawings.Revision, Drawings.Status, Drawings.ShopRevision, Drawings.DrawingFilename, Drawings.DwgDue, Drawings.DSaw, Drawings.DRobotics, Drawings.DOrdered, Drawings.DShopStatus, Drawings.DEstHours, Drawings.DRush, Drawings.ShopComments,
Jobs.ID AS jobid, Jobs.Quote, Jobs.Job, Jobs.Customer, Jobs.JobName, Jobs.Active, Jobs.NDT, Jobs.Inspection,
Python.PJob, Python.PSeries, Python.Completed
FROM Drawings
INNER JOIN Jobs ON Drawings.Job = Jobs.Job
LEFT OUTER JOIN Python ON Python.PJob = Drawings.Job AND Python.PSeries = Drawings.Series
OUTER APPLY (SELECT TOP 1 ShopComments.cpid, ShopComments.drawingid, ShopComments.shopcomment 
FROM ShopComments
WHERE ShopComments.drawingid = Drawings.ID ORDER BY ShopComments.cpid ASC
)sc
WHERE Drawings.Status='Shop Issued' AND Jobs.Active='True' AND Drawings.DOrdered='Yes' AND DShopStatus IS NULL
OR Drawings.Status='Shop Issued' AND Jobs.Active='True' AND Drawings.DOrdered='Yes' AND DShopStatus='Awaiting Production
ORDER BY CONVERT(Date, DwgDue, 103) ASC

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
https://www.facebook.com/VmBlogs

rtown
Yak Posting Veteran

53 Posts

Posted - 2013-11-05 : 12:44:58

quote:

Originally posted by visakh16

as per your explanation you need OUTER APPLY only


SELECT
Drawings.ID, Drawings.Job, Drawings.Series, Drawings.Returned, Drawings.Description, Drawings.Revision, Drawings.Status, Drawings.ShopRevision, Drawings.DrawingFilename, Drawings.DwgDue, Drawings.DSaw, Drawings.DRobotics, Drawings.DOrdered, Drawings.DShopStatus, Drawings.DEstHours, Drawings.DRush, Drawings.ShopComments,
Jobs.ID AS jobid, Jobs.Quote, Jobs.Job, Jobs.Customer, Jobs.JobName, Jobs.Active, Jobs.NDT, Jobs.Inspection,
Python.PJob, Python.PSeries, Python.Completed
FROM Drawings
INNER JOIN Jobs ON Drawings.Job = Jobs.Job
LEFT OUTER JOIN Python ON Python.PJob = Drawings.Job AND Python.PSeries = Drawings.Series
OUTER APPLY (SELECT TOP 1 ShopComments.cpid, ShopComments.drawingid, ShopComments.shopcomment 
FROM ShopComments
WHERE ShopComments.drawingid = Drawings.ID ORDER BY ShopComments.cpid ASC
)sc
WHERE Drawings.Status='Shop Issued' AND Jobs.Active='True' AND Drawings.DOrdered='Yes' AND DShopStatus IS NULL
OR Drawings.Status='Shop Issued' AND Jobs.Active='True' AND Drawings.DOrdered='Yes' AND DShopStatus='Awaiting Production
ORDER BY CONVERT(Date, DwgDue, 103) ASC

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
https://www.facebook.com/VmBlogs

Thank you visakh16, unfortunately I had tried an outer apply as well and didn't yield any results when there are in fact records that should be displayed. No errors, so I assume something is not functioning as intended.

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2013-11-05 : 12:56:01

May be the rule you specify are not correct. Are you sure there are records satisfying condition ShopComments.drawingid = Drawings.ID in table ShopComments?

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
https://www.facebook.com/VmBlogs

rtown
Yak Posting Veteran

53 Posts

Posted - 2013-11-05 : 13:19:05

quote:
Originally posted by visakh16

May be the rule you specify are not correct. Are you sure there are records satisfying condition ShopComments.drawingid = Drawings.ID in table ShopComments?

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
https://www.facebook.com/VmBlogs

Yes I am sure, I tested the select alone within MS SQL Manager and it did indeed pull the top 1 record. I am not very familiar with outer apply, in fact this is the first time I have used this. Perhaps I am missing something.

rtown
Yak Posting Veteran

53 Posts

Posted - 2013-11-05 : 14:00:22

Just a thought but perhaps it's the method that I am trying to access the results of the outer apply. If I use SC to access them it gives me no results. With a recordset SC I get an error as the program does not recognize this variable, likewise if I try and access the field name ie: recordset shopcomment. So to summarize, maybe I am not understanding how to access the record that may in fact exist...

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