[AccessD] Basic Query Design

One note: Would this query allow the user to go for coffee while waiting for
the results? 'Sub queries' and 'not exists' has certain reputations?

Jim 

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Stuart McLachlan
Sent: February 8, 2006 7:04 PM
To: Access Developers discussion and problem solving
Subject: Re: [AccessD] Basic Query Design

On 8 Feb 2006 at 20:36, Steve Erbach wrote:
 
> SELECT DISTINCT EmployeeID
> FROM tblEmployeeCourse AS EC1
> WHERE NOT EXISTS
>   ( SELECT CourseID FROM tblCourse
>     WHERE CourseID In (1,2,4,5) AND NOT EXISTS
>       ( SELECT * FROM tblEmployeeCourse AS EC2
>         WHERE EC2.CourseID = tblCourse.CourseID
>         AND EC2.EmployeeID = EC1.EmployeeID))
> 

Ouch! My head hurts!

-- 
Stuart


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