Condensing duplicate data while maintaining multiple entries per client - sql

Question

I apologize if the title is not descriptive enough. I am having a hard time describing what I am looking for.
I understand this is normally done on the front end but a client is requesting to have this data displayed in this way. this should show a single column with client information (lastname, firstname) and any/all booked appointments. Since there may be more than one appointment per client duplicate data will be displayed along each line. That will look like this:
lastName | firstName | apptDate | myStartTime | myEndTime
smith..............| john................| 4/7/2016........| 7:00.........................| 8:00
smith..............| john................| 4/9/2016........| 6:00.........................| 7:00
smith..............| john................| 4/14/2016......| 10:00.......................| 11:00
arnold.............| williams..........| 4/10/2016......| 7:00.........................| 11:00
arnold.............| williams..........| 4/11/2016......| 8:00.........................| 12:00
but I would like that to be displayed as:
smith..............| john................| 4/7/2016........| 7:00.........................| 8:00
................................................| 4/9/2016........| 6:00.........................| 7:00
................................................| 4/14/2016......| 10:00.......................| 11:00
arnold..............| williams.........| 4/10/2016.......| 7:00.........................| 11:00
................................................| 4/11/2016.......| 8:00.........................| 12:00
This is what I am currently working with:
SELECT
CASE
WHEN cli.rownum = 1 THEN cli.clientID
END AS 'clientID'
,CASE
WHEN cli.rownum = 1 THEN cli.lastName
END AS 'lastName'
,CASE
WHEN cli.rownum = 1 THEN cli.firstName
END AS 'firstName'
,CASE
WHEN cli.rownum = 1 THEN cli.homePhone
END AS 'home'
,CASE
WHEN cli.rownum = 1 THEN cli.cellPhone
END AS 'cell'
,info.*
,CASE
WHEN cli.rownum = 1 THEN cli.staffAlertMsg
END AS 'alert'
,cli.notes AS 'notes'
,CONVERT(varchar(10),cli.classDate,101) AS 'date'
,cli.myStartTime AS 'start'
,cli.myEndTime AS 'end'
,cli.typeName AS 'appointment'
FROM
(SELECT
c.clientID
,c.lastName
,c.firstName
,c.homePhone
,c.cellPhone
,info.*
,r.notes
,c.staffAlertMsg
,r.ClassDate
,r.myStartTime
,r.myEndTime
,vt.TypeName
,ROW_NUMBER()
OVER(PARTITION BY c.clientID ORDER BY c.clientID) AS 'rownum'
FROM clients c
LEFT OUTER JOIN tblReservation r
ON c.clientID = r.clientID
LEFT OUTER JOIN tblVisitTypes vt
ON vt.TypeID = r.visitType
OUTER APPLY
(SELECT
max(CASE
WHEN civ.clientIndexID = 4
THEN civ.clientIndexValueName
END) AS 'priority'
,max(CASE
WHEN civ.clientIndexID = 5
THEN civ.clientIndexValueName
END) AS 'lang'
,max(CASE
WHEN civ.clientIndexID = 17
THEN civ.clientIndexValueName
END) AS 'inter'
,max(CASE
WHEN ccf.name LIKE 'prac'
THEN ccv.TextVal
END) AS 'prac'
,max(CASE
WHEN st.TypeID = 100000001 THEN st.typeName
END) AS 'ride?'
,max(CASE
WHEN st.typeID = 100000006 THEN st.typeName
END) AS 'l?'
FROM tblClientCustomValues ccv
INNER JOIN tblClientCustomFields ccf
ON ccv.ID = ccf.ID
INNER JOIN tblClientIndexData cid
ON ccv.clientID = cid.clientID
INNER JOIN tblClientIndexValue civ
ON cid.clientIndexValueID = civ.clientIndexValueID
LEFT JOIN [type details] td
ON ccv.clientID = td.clientID
LEFT JOIN [student types] st
ON td.typeID = st.typeID
WHERE c.clientID = ccv.clientID
) info
) cli
WHERE cli.clientID != '-2'
AND cli.clientID != '0'
AND cli.clientID != '1'
AND (cli.classDate >= '4/1/2016'
AND cli.classDate <= '4/30/2016')

Answer 1

Assuming you want to only return the name for the first row of each client then this should work (also assuming a primary key column of ID on the clients table):
SELECT CASE WHEN cli.rownum = 1 THEN cli.lastName END AS lastName
,CASE WHEN cli.rownum = 1 THEN cli.firstName END AS firstName
,CONVERT(varchar(10),cli.apptDate,101) AS 'apptDate'
,cli.myStartTime
,cli.myEndTime
FROM
(SELECT c.ID
,c.lastName
,c.firstName
,r.apptDate
,r.myStartTime
,r.myEndTime
,ROW_NUMBER() OVER (PARTITION BY c.ID ORDER BY c.ID, r.apptDate, r.myStartTime) as rownum
FROM clients c
LEFT OUTER JOIN tblReservation r
ON c.clientID = r.clientID
LEFT OUTER JOIN tblVisitTypes vt
ON vt.TypeID = r.VisitType)
cli
ORDER BY cli.ID, cli.rownum
I have made both the join LEFT OUTER JOINS as your second INNER JOIN would have made the first join an INNER, which I assume is not what you wanted.