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Posted by Erland Sommarskog on 11/09/61 11:26
Eric Robinson (eric @ pmcipa..{com}) writes:
> These tables are part of our medical database. For example, a person
> seeking healthcare may want to know the names and contact information
> for all doctors in Reno, NV, who do cardiology. Sounds simple, but it
> isn't.
>
> A medical group can have many doctors.
> A doctor may be a member of more than one medical group.
> A doctor or group can have multiple specialties.
> A group can have multiple facilities (physical locations).
>
> So the tables look like this...
It is always preferable to post CREATE TABLE scripts for the table.
That and test data in INSERT statemants, and the desired result of
the test data. That will give you a tested solution.
So this is an untested solution:
SELECT D.DoctorName
FROM Doctors D
WHERE EXISTS (SELECT *
FROM Doc2Groups DG
JOIN Facility F ON F.GroupID = DG.GroupID
WHERE DG.DoctorID = D.DoctorID
AND F.State = 'NV'
AND F.City = 'Reno')
AND EXISTS (SELECT *
FROM Doc2Specialiity DS
JOIN Specialtities S ON DS.SpecialityID = S.SpecialityID
WHERE DS.DoctorID = S.DoctorID
AND S.SpecialityDesc = 'Cardiology')
UNION
SELECT D.DoctorName
FROM Doctors D
WHERE EXISTS (SELECT *
FROM Doc2Groups DG
JOIN Facility F ON F.GroupID = DG.GroupID
JOIN Group2Specialiity GS ON GS.GroupID = DS.GroupID
JOIN Specialtities S ON GS.SpecialityID = S.SpecialityID
WHERE DG.DoctorID = D.DoctorID
AND F.State = 'NV'
AND F.City = 'Reno'
AND S.SpecialityDesc = 'Cardiology')
--
Erland Sommarskog, SQL Server MVP, esquel@sommarskog.se
Books Online for SQL Server SP3 at
http://www.microsoft.com/sql/techinfo/productdoc/2000/books.asp
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