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03.03.2008 at 07:52AM PST, ID: 23209674

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8.6

Complex joined query

Zones: SQL Query Syntax, MS SQL Server, SQL Server 2005

Tags: Microsoft, SQL Server 2005

Hello, I have three tables which I need to get information out of which is proving slightly more complicated than I expected.

The tables are
Client
Job
Contact
Call Log

And the brief is to return the list of clients who have not had booked a job in for the last three months, along with the details for the most recent job and the details of the most recent call log made in regard to that client.

The links in the tables are Job.JobID, Client.ClientID, Job.ClientID, CallLog.ClientID, Job.ClientID

The date field to sort the jobs by is Job.DeadlineDate, this would be the one which would be the basis of the date filter. The date filter would be the function <= DATEADD(Month,-3,GetDate())

So in essence I need to select

Client.Name, Job.JobTitle, Job.DeadlineDate, Contact.FirstName, Contact.LastName, CallLog.ID

Where the job record is the most recent one (but only if that job was before 3 months ago, and not if there are any jobs for that client since....), and the call log must be the most recent one for that client, regardless of timing.

Can anyone help? Let me know if you need any more information or detail of any kind.

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Question Stats

Zone: Programming

Question Asked By: butterhook

Solution Provided By: dqmq

Participating Experts: 5

Solution Grade: A

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EE Bugs

03.03.2008 at 08:33AM PST, ID: 21033087

Rank: Sage

dqmq:

Does this return client with JobID's in the last three months?

Select ClientID from Job where Job.DeadlineDate <= DATEADD(Month,-3,Getdate())

Then, does this return clients who do not have such a job?

Select * from Client where not exists
(
Select ClientID from Job where Job.DeadlineDate <= DATEADD(Month,-3,Getdate()) and job.clientID = client.clientID
)

And this should bring in the rest. Except for the joint to Contact (don't have enough info for that, but you can figure it out). This is not syntax checked, so you my need to correct some typos.

Select C.Name, J.JobTitle, J.DeadlineDate, Contact.FirstName, Contact.LastName, L.ID
From
(
Select * from Client where not exists
(
Select 1 from Job where Job.DeadlineDate <= DATEADD(Month,-3,Getdate()) and job.clientID = client.clientID
)
) c
inner join job j on j.clientID = c.clientID
where j.deadlinedate =
(select max(job.deadlinedate) from job where job.clientID = j.clientID)
inner join calllog L on L.clientID = c.clientID
where L.CALLLOGDATE =
(select max(CALLLOGDATE) from calllog where callog.clientID = L.clientID)
inner join contact on ???????

Accepted Solution

03.03.2008 at 09:38AM PST, ID: 21033793

Rank: Wizard

ee_rlee:

hi, try this

replace CallDate by the datetime field in table calllog

                       
             SELECT C.Name, J.JobTitle, J.DeadlineDate, Co.FirstName, Co.LastName, CL.ID
FROM Client C LEFT JOIN
     Contact Co ON (C.ClientID=Co.CliendID) LEFT JOIN
     (SELECT ClientID, JobTitle, DeadlineDate, ROW_NUMBER() OVER (PARTITION BY ClientID ORDER BY DeadlineDate DESC) AS R 
      FROM Job 
      WHERE DeadlineDate<= DATEADD(Month,-3,GetDate())) J ON (C.ClientID=J.CliendID AND R=1) LEFT JOIN
     (SELECT ClientID, ID, ROW_NUMBER() OVER (PARTITION BY ClientID ORDER BY CallDate DESC) AS R 
      FROM CallLog) CL ON (C.ClientID=CL.CliendID AND R=1)

Open in New Window

Assisted Solution

03.03.2008 at 10:22AM PST, ID: 21034154

koutny:

I think that in dqmq's solution the condition in the inside select statement should be greater than, not smaller or equal:

Select * from Client where not exists
(
Select ClientID from Job where Job.DeadlineDate > DATEADD(Month,-3,Getdate()) and job.clientID = client.clientID
)

because you want to check whether any records exist for the last 3 months

Anyway, here is my contribution:

                       
             Select Max(Contact.ContactID) as ContactID, Max(Job.DeadlineDate) as LastJobDate,
   (select Job.JobTitle FROM Job J2 WHERE J2.ClientID = Client.ClientID AND J2.DeadlineDate = Max(Job.DeadlineDate) as LastJobTitle,
   (Select Top 1 L.ID FROM CallLog WHERE CallLog.ClientID = Client.ClientID ORDER BY CallLogDate DESC) as MostRecentCallLogID
 FROM 
   Client LEFT JOIN Job ON Client.ClientID = Job.ClientID 
     LEFT JOIN Contact ON ...do your contact table join here...
 GROUP BY Client.ClientID HAVING Max(Job.DeadlineDate) <= DATEADD(Month,-3,Getdate() OR Max(Job.ClientID) IS NULL

Open in New Window

Assisted Solution

03.03.2008 at 05:32PM PST, ID: 21037532

Rank: Master

yuching:

Try this

SELECT Client.Name, Job.JobTitle, Job.DeadlineDate, Contact.FirstName, Contact.LastName, CallLog.ID
FROM Client
INNER JOIN (
SELECT ClientID, MAX(DeadlineDate) AS MAXDeadlineDate
FROM Job
WHERE DeadlineDate >= DATEADD(Moth, -3 GETDATE())
GROUP BY ClientID
) MaxJOB ON MAXJOB.ClientID = Client.ClientID
INNER JOIN Job ON Job.ClientID = MAXJOB.ClientID AND Job.DeadlineDate = MAXJOB.DeadlineDate
INNER JOIN Contact ON Contact.ClientID = Client.ClientID
LEFT OUTER JOIN (
SELECT ClientID, MAX(CalllogDate) AS MaxCalllogDate
FROM CallLog
GROUP BY ClientID
) MaxCallLog ON Client.ClientID = MaxCalllog.ClientID
LEFT OUTER JOIN CallLog ON Calllog.ClientID = MaxCalllog.ClientID
AND Calllog.CallogDate = MaxCalllogDate

Assisted Solution

04.07.2008 at 04:30PM PDT, ID: 21301405

Rank: Master

mbizup:

Hello,
This question has been inactive for more than 21 days, and is now classified as abandoned. I will post a recommendation on it's resolution in the Cleanup Zone in approximately four days. I would appreciate any comments from the participants that would help me make this recommendation.

butterhook,
Please take some time to review and close this and any other 'old' questions. If you don't know how to close your questions, the following help topic addresses closing and grading questions (including cases where there was no correct answer, or the question was independently resolved):

http://www.experts-exchange.com/help.jsp#hi331

If there is no response here, I will assume that there is no further interest in this question.

mbizup
EE Cleanup Volunteer

04.20.2008 at 05:51AM PDT, ID: 21395887

Rank: Master

mbizup:

No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I will leave the following recommendation for this question in the Cleanup topic area:
Split: dqmq {http:#21033087} & ee_rlee {http:#21033793} & koutny {http:#21034154} & yuching {http:#21037532}

Any objections should be posted here in the next 4 days. After that time, the question will be closed.

mbizup
EE Cleanup Volunteer

Computer101

04.26.2008 at 06:33PM PDT, ID: 21447510

Forced accept.

Computer101
EE Admin

20080236-EE-VQP-29 / EE_QW_2_20070628