Converting row to columns in SQL Server - sql

Question

I have a query that returns the following result set:
patName SName DISC SCHEDULE
JM AA HA 2 per Week
JM MAC MSW 1 per Month
JM ANG RN 1 per Week
JM JON RN 1 per Week
JM LRH RN 1 per Week
Is there any way I could display the result as follows using PIVOT
PATNAME HA MSW RN
JM AA 2/Week MAC 1/Month ANG 1/week
JON 1/Week
LRH 1/Week
Edit, my query is as follows:
SELECT PatientName, [RN], [HA], [LVN], [MSW], [SC]
FROM
(
SELECT DISTINCT (tblPatient.FirstName +' '+ tblPatient.LastName) As PatientName,
(tblStaff.StaffFirstName+' '+tblStaff.StaffLastName) As StaffName,
(tblStaffDiscipline.Discipline)As Discipline,
CAST(tblFrequencyOfVisit.NoOfVisit As Varchar)+' per '
+ REPLACE (tblFrequencyOfVisit.Period,'/','') AS Visits new_value,
row_number() over(partition by PatientName, Discipline order by Discipline) rowNum
FROM tblPatient INNER JOIN
tblFrequencyOfVisit
ON tblPatient.PatientId = tblFrequencyOfVisit.PatientId
INNER JOIN tblStaffAssignment
ON tblPatient.PatientId = tblStaffAssignment.PatientId
AND tblFrequencyOfVisit.PatientId = tblStaffAssignment.PatientId
INNER JOIN tblStaffDiscipline
ON tblFrequencyOfVisit.DisciplineId = tblStaffDiscipline.DisciplineId
INNER JOIN tblStaff
ON tblStaffAssignment.StaffId = tblStaff.StaffId
AND tblStaffDiscipline.Discipline = tblStaff.StaffDisciplane
)src
pivot
(
max(new_value)
for Discipline in ([RN], [HA], [LVN], [MSW], [SC])
) piv
WHERE
tblpatient.PatientId = '138'
AND NOT tblPatient.SOC IS NULL
AND tblPatient.EOC IS NULL
AND tblPatient.Hospiceid = '1'
AND tblFrequencyofVisit.FromDate =
(Select MAX(FROMDATE)
From tblfrequencyofVisit
Where tblFrequencyOfVisit.PatientId = tblPatient.PatientId
AND tblFrequencyofVisit.Disciplineid = tblStaffDiscipline.Disciplineid )

Answer 1

You can use the PIVOT function to perform this. If you have known values, then you can hard-code the columns using a static pivot. To get the grouping correct in the PIVOT, I included a row_number() so the result will include each record not just the max() value per patname:
select patname, [HA], [MSW], [RN]
from
(
select patName, Disc,
sname+' '+schedule new_value,
row_number() over(partition by patname, disc order by disc) rowNum
from <yourquery here>
) src
pivot
(
max(new_value)
for disc in ([HA], [MSW], [RN])
) piv
See SQL Fiddle with Demo
If you have unknown values in the DISC field, then you can use dynamic SQL to pivot the data:
DECLARE #cols AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX)
select #cols = STUFF((SELECT distinct ',' + QUOTENAME(disc)
from yourquery
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set #query = 'SELECT patname, ' + #cols + '
from
(
select patName, Disc,
sname+'' ''+schedule new_value,
row_number() over(partition by patname, disc order by disc) rowNum
from <yourquery here>
) x
pivot
(
max(new_value)
for Disc in (' + #cols + ')
) p '
exec(#query)
See SQL Fiddle with Demo
If you do not have a PIVOT function available, then this can be replicated using an aggregate function and a CASE statement:
select patname,
max(case when disc='HA' then new_value end) HA,
max(case when disc='MSW' then new_value end) MSW,
max(case when disc='RN' then new_value end) RN,
rowNum
from
(
select patName, Disc,
sname+' '+schedule new_value,
row_number() over(partition by patname, disc order by disc) rowNum
from yourquery
) src
group by patname, rownum
See SQL Fiddle with Demo
Edit, based on your query that you posted it looks like you might need to use something like this:
SELECT PatientName, [RN], [HA], [LVN], [MSW], [SC]
FROM
(
SELECT
(tblPatient.FirstName +' '+ tblPatient.LastName) As PatientName,
(tblStaff.StaffFirstName+' '+tblStaff.StaffLastName) As StaffName,
(tblStaffDiscipline.Discipline)As Discipline,
CAST(tblFrequencyOfVisit.NoOfVisit As Varchar)+' per '+ REPLACE (tblFrequencyOfVisit.Period,'/','') AS Visits new_value,
row_number() over(partition by PatientName, Discipline order by Discipline) rowNum
FROM tblPatient
INNER JOIN tblFrequencyOfVisit
ON tblPatient.PatientId = tblFrequencyOfVisit.PatientId
INNER JOIN tblStaffAssignment
ON tblPatient.PatientId = tblStaffAssignment.PatientId
AND tblFrequencyOfVisit.PatientId = tblStaffAssignment.PatientId
INNER JOIN tblStaffDiscipline
ON tblFrequencyOfVisit.DisciplineId = tblStaffDiscipline.DisciplineId
INNER JOIN tblStaff
ON tblStaffAssignment.StaffId = tblStaff.StaffId
AND tblStaffDiscipline.Discipline = tblStaff.StaffDisciplane
WHERE tblpatient.PatientId = '138'
AND NOT tblPatient.SOC IS NULL
AND tblPatient.EOC IS NULL
AND tblPatient.Hospiceid = '1'
AND tblFrequencyofVisit.FromDate = (Select MAX(FROMDATE)
From tblfrequencyofVisit
Where tblFrequencyOfVisit.PatientId = tblPatient.PatientId
AND tblFrequencyofVisit.Disciplineid = tblStaffDiscipline.Disciplineid )
)src
pivot
(
max(new_value)
for Discipline in ([RN], [HA], [LVN], [MSW], [SC])
) piv