Getting the primacy function for an emolyee - sql

Question

I have this following query to get the primacy for an employee :
with
employeeScopeFunctions as (
select e.employeeId,
es.FunctionId,
ef.Label,
c.CompanyName
,es.SortOrder
from employee e
LEFT JOIN employee_scope es on es.employeeId = e.employeeId
LEFT JOIN employee_function ef on es.FunctionId = ef.FunctionId
LEFT JOIN Company c ON es.CompanyId = c.ID
WHERE e.EmployeeId=54
)
SELECT DISTINCT esf.EmployeeId, esf.FunctionId
,STUFF((SELECT ',' + CompanyName
FROM employeeScopeFunctions es
WHERE esf.EmployeeId=es.EmployeeId AND esf.FunctionId=es.FunctionId
FOR XML PATH('')),1,1,'') AS Companies
,SUM(esf.SortOrder) as sumOrder
FROM employeeScopeFunctions esf
GROUP BY esf.EmployeeId,esf.FunctionId
My output is like below :
EmployeeId FunctionId Label CompanyName sumOrder
54 39 Director C1,C2,X5 224
54 273 Group Chief Executive Officer X6,F6 66
54 897 Group Regional Chief Executive Officer VY,G7 130
What I want is to get primacy (primary,secondary, tertiary) to each function like below :
EmployeeId FunctionId Label CompanyName sumOrder primacy
54 39 Director C1,C2,X5 224 tertiary
54 273 Group Chief Executive Officer X6,F6 66 primary
54 897 Group Regional Chief Executive Officer VY,G7 130 secondary
The function having the minimal sumOrder will be the primary function and so on.

Answer 1

You can use a ROW_NUMBER() ordered by the SUM() result, then a CASE to display your custom string value.
;with employeeScopeFunctions as
(
SELECT
e.employeeId,
es.FunctionId,
ef.Label,
c.CompanyName,
es.SortOrder
FROM
employee e
LEFT JOIN employee_scope es on es.employeeId = e.employeeId
LEFT JOIN employee_function ef on es.FunctionId = ef.FunctionId
LEFT JOIN Company c ON es.CompanyId = c.ID
WHERE
e.EmployeeId = 54
),
RankingBySum AS
(
SELECT
esf.EmployeeId,
esf.FunctionId,
STUFF (
(
SELECT ',' + CompanyName
FROM employeeScopeFunctions es
WHERE esf.EmployeeId=es.EmployeeId AND esf.FunctionId=es.FunctionId
FOR XML PATH('')
)
, 1,1,'') AS Companies,
SUM(esf.SortOrder) as sumOrder,
-- Add this ranking here
SumRanking = ROW_NUMBER() OVER (PARTITION BY esf.EmployeeId ORDER BY SUM(esf.SortOrder) ASC)
FROM
employeeScopeFunctions esf
GROUP BY
esf.EmployeeId,
esf.FunctionId
)
SELECT
R.EmployeeId,
R.FunctionId,
R.Companies,
R.sumOrder,
-- Display your primacy condition here
primacy = CASE R.SumRanking
WHEN 1 THEN 'primary'
WHEN 2 THEN 'seconday'
WHEN 3 THEN 'tertiary' END
FROM
RankingBySum AS R