Question

I need to select certain records with cases from multiple tables and I need to select them based on some cases that I will create.

This is what I have so far for my query:

select distinct top 10  
        QuestionTag =( CASE 
                    WHEN qt.id = 98 THEN 'Save the Sale TP'
                    WHEN qt.id = 99 THEN 'Close the Loop'
                    WHEN qt.id != 98 AND qt.id != 99 THEN ''
                    WHEN qt.id = 98 AND qt.id = 99 THEN 'Save the Sale TP'
                END),
        c.contactid as contactid, c.first, c.last,
        st.datecomplete, st.ownerIdfk, st.finalScore, st.surveyid,
        cc.clientcontactid, cc.leadsource,
        se.eventdate, se.ProcedureName, se.LocationName, se.salesperson, se.SpecialistName, st.surveyname
        from sigweb.dbo.survey_tracking st
        join sigweb.dbo.survey_types_main stm on st.surveyid =  stm.surveyidfk      
        join sigweb.dbo.contact c on st.contactid = c.contactid
        join survey.dbo.client_contacts cc on c.contactid = cc.contactidfk
        join survey.dbo.survey_events se on c.contactid = se.contactidfk 
        join survey.dbo.results r on r.owneridfk = st.owneridfk
        left join survey.dbo.questionsAdmin qa on qa.questionidfk = r.questionidfk
        join survey.dbo.QuestionTags qt on qt.id=qa.tagidfk

This is part of the output:

QuestionTag             ContactID               First   Last  
-----------             ---------               -----   ----  
                        2012082911569010000001  John    Reardon 
Close the Loop          2012082911569010000001  John    Reardon 
Save the Sale TP        2012082911569010000001  John    Reardon                               
                        2012082911569010000003  Beverly Conley 
Close the Loop          2012082911569010000003  Beverly Conley 
Save the Sale TP        2012082911569010000003  Beverly Conley  
                        2012082911569010000009  Larry   Grigsby     
                        2012082911569010000011  Brenda  Bain    
                        2012082911569010000012  Richard Pecora  
                        2012082911569010000018  Karl    Oliszczak

I need to add a “where” to select only one of the duplicate records based on these cases:

IF a contactid has only CTL then select that
IF a contactid has only STS TP then select that
IF a contact appears more than once and it has ” and CTL and STS TP then output only the STS TP
IF a contact does not have CL or STS TP then do not output the contact at all.

I was thinking that I need to add one more case inside my WHERE clause but I was wondering if there is another method that will save me time and code writing

Answer 1

This is my improved attempt. It does what it is supposed to do but it is kind of slow.

        select 
        qt.questiontag, qt.id,
        c.contactid as contactid, c.first, c.last,
        st.datecomplete, st.ownerIdfk, st.finalScore, st.surveyid,
        cc.clientcontactid, cc.leadsource,
        se.eventdate, se.ProcedureName, se.LocationName, se.salesperson, se.SpecialistName, st.surveyname
        from sigweb.dbo.survey_tracking st
        join sigweb.dbo.survey_types_main stm on st.surveyid =  stm.surveyidfk      
        join sigweb.dbo.contact c on st.contactid = c.contactid
        join survey.dbo.client_contacts cc on c.contactid = cc.contactidfk
        join survey.dbo.survey_events se on c.contactid = se.contactidfk and st.surveyid = se.surveytypeidfk
        left join survey.dbo.questiontags qt on 
            (select top 1 qa.tagidfk
            from survey.dbo.results r
            join survey.dbo.questionsadmin qa on r.answeridfk = qa.answeridfk and (qa.tagidfk = 98 or qa.tagidfk = 99)
            where st.owneridfk = r.owneridfk
            order by qa.tagidfk ) = qt.id
        where st.datecomplete > '2013-02-01'