SQL syntax with Distinct and All

I am presently using the below code to return a recordset for a DAO 3.6/VB6 project. It truncates the Abstract field since it is a memo field and I have found that we can't use DISTINCT with a memo field. Could someone please tell me how to alter the code to use SELECT DISTINCT for all the other fields and include the Abstract field without DISTINCT?

strSQL = "SELECT DISTINCT AuthorPub.MedlineAuthorName, Pub.Journal, Pub.Abstract, Pub.Citation , Pub.PubYear, Pub.Title, Pub.MedlineID From Pub, AuthorPub " _
& "WHERE Pub.medlineid = AuthorPub.MedlineID " _
& "AND (AuthorPub.MedlineAuthorName = '" & strAuthor & "') " _
& "ORDER BY Pub.PubYear DESC"
TurnerPAsked:
Who is Participating?
 
JgouldCommented:
Question has been closed as per recommendation

JGould-EE Moderator
0
 
nigelrivettCommented:
If you are reducing the number of rows for the other fields by using distinct you will also have to reduce the number of values for the memo field (you can only have one value per row).
You could use a subquery to get back the data for the memo field and a group by for all the others.

SELECT AuthorPub.MedlineAuthorName, Pub.Journal, Pub.Citation , Pub.PubYear,
Pub.Title, Pub.MedlineID ,
Abstract = (select P2.Abstract from pub p2 where p2.id = pub.id)
0
 
TurnerPAuthor Commented:
OK, I understand the logic here, but I am rather new at this and don't understand subqueries and the proper syntax. I'll give you the 200 if you would please rewrite my above code incorporating the subquery so it could work. (I have a deadline and we are moving our home on Wednesday. I have packed my SQL book!)I hope you'll do this. Thanks.
0
Improve Your Query Performance Tuning

In this FREE six-day email course, you'll learn from Janis Griffin, Database Performance Evangelist. She'll teach 12 steps that you can use to optimize your queries as much as possible and see measurable results in your work. Get started today!

 
nigelrivettCommented:
try something like (this is for sql server don't know what you have)

"SELECT DISTINCT AuthorPub.MedlineAuthorName, Pub.Journal, Pub.Citation , Pub.PubYear,
Pub.Title, Pub.MedlineID, " _
& "Abstract = (select top 1 P2.Abstract from pub p2 where p2.id = pub.id), " _
& " From Pub, AuthorPub " _
& "WHERE Pub.medlineid = AuthorPub.MedlineID " _
& "AND (AuthorPub.MedlineAuthorName = '" & strAuthor & "') " _
& "ORDER BY Pub.PubYear DESC"
0
 
TurnerPAuthor Commented:
Great! Thanks for your help. We're getting there...

It returns the following SQL statement and a runtime error 3342 (Invalid memo, OLE or Hyperlink Object in subquery 'P2.Abstract'

SELECT DISTINCT AuthorPub.MedlineAuthorName, Pub.Journal, Pub.Citation , Pub.PubYear, Pub.Title , Pub.MedlineID, Abstract = (select top 1 P2.Abstract from pub p2 where p2.id = pub.id)  From Pub, AuthorPub WHERE Pub.medlineid = AuthorPub.MedlineID AND (AuthorPub.MedlineAuthorName = 'Amstey MS') ORDER BY Pub.PubYear DESC



0
 
TurnerPAuthor Commented:
According to the documentation, you can't use a memo field in a subquery. Is there a way around this?
0
 
nico5038Commented:

No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:
 - PAQ'd and pts refunded
Please leave any comments here within the
next seven days.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER !

Nic;o)
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.