CTC Annual History as a Pivot Table sql server - sql

Question

My table looks like below
select * from Salary_hist
EMPNAME CTC DateAdded
===========================
Ram 300000 2015-01-01
Ram 30000 2014-01-01
Ram 3000 2013-01-02
Ram 2700 2013-01-01
Ram 300 2012-01-01
Ram 30 2011-01-01
I am trying to make the output to show History increase for all employee based on Max Salary for a particular year
Output like
EMPNAME 2015 2014 2013 2012 2011
============================================
Ram 300000 30000 3000 300 30
Tried two method using rank and Alias but seems missing some thing.
select
Y.EMPNAME,
year(Y.DateAdded),
year(y.DateAdded)-2,
year(y.DateAdded)-3,
year(y.DateAdded)-4,
year(y.DateAdded)-5
from (
select X.EMPNAME,
max(case when rn = 1 then CTC end) as dateadded,
max(case when rn = 2 then CTC end) as dateadded1,
max(case when rn = 3 then CTC end) as dateadded2,
max(case when rn = 4 then CTC end) as dateadded3,
max(case when rn = 5 then CTC end) as dateadded4
from
(
select row_number() over (partition by empname order by dateadded desc) as rn,
empname,
CTC,
Dateadded
from Salary_hist
) X group by EMPNAME,dateadded)
y
And
select EMPNAME,
max(case when DatePart(Year, dateadded) = DatePart(Year, GETDATE()) then CTC end) as dateadded,
max(case when DatePart(Year, dateadded) = DatePart(Year, GETDATE()-1) then CTC end) as dateadded-1,
max(case when DatePart(Year, dateadded) = DatePart(Year, GETDATE()-2) then CTC end) as dateadded-2,
max(case when DatePart(Year, dateadded) = DatePart(Year, GETDATE()-3) then CTC end) as dateadded-3,
max(case when DatePart(Year, dateadded) = DatePart(Year, GETDATE()-4 ) then CTC end) as dateadded-4,
max(case when DatePart(Year, dateadded) = DatePart(Year, GETDATE()-5) then CTC end) as dateadded-5
from Salary_hist
group by EMPNAME, dateadded)

Answer 1

You can do this in a much simple way using MAX with PARTITION BY and taking DISTINCT on it. You doesn't need a Sub-query here.
1. STATIC PIVOT
You can use this when the value of year is known in advance.
SELECT EMPNAME,[2015],[2014],[2013],[2012],[2011]
FROM
(
SELECT DISTINCT EMPNAME,MAX(CTC) OVER(PARTITION BY EMPNAME,YEAR(DATEADDED))MAXCTC,
YEAR(DATEADDED)PERIOD
FROM #TEMP
)S
PIVOT
(
MIN(MAXCTC)
FOR PERIOD IN([2015],[2014],[2013],[2012],[2011])
)P
Click here to view result
2. Dynamic pivot
You can use this if the values of year is unknown in advance.
DECLARE #cols NVARCHAR (MAX)
SELECT #cols = COALESCE (#cols + ',[' + YEAR + ']', '[' + YEAR + ']')
FROM (SELECT DISTINCT CAST(YEAR(DATEADDED)AS VARCHAR(4)) [YEAR] FROM #TEMP) PV
ORDER BY CAST([YEAR] AS INT) DESC
DECLARE #query NVARCHAR(MAX)
SET #query = 'SELECT * FROM
(
SELECT DISTINCT EMPNAME,MAX(CTC) OVER(PARTITION BY EMPNAME,YEAR(DATEADDED))MAXCTC,
YEAR(DATEADDED)PERIOD
FROM #TEMP
) x
PIVOT
(
MIN(MAXCTC)
FOR PERIOD IN (' + #cols + ')
) p
ORDER BY EMPNAME;'
EXEC SP_EXECUTESQL #query
Click here to view result

Answer 2

With that kind of table structure making a select that returns start salary of the year in case there is no salary increase for that year and otherwise returns the max. salary makes it slightly more complex:
select
empname, [2011], [2012], [2013], [2014], [2015]
from
(
select
empname,
year(dateAdded) as year,
max(CTC) as CTC
from
salary_hist S
group by
empname,
year(dateAdded)
union all
select
S.empname,
Y.Year,
S.CTC
from
(select distinct year(DateAdded) as Year from Salary_hist) Y
outer apply (
select S.empname, S.CTC,
row_number() over
(partition by empname order by DateAdded desc) as RN
from Salary_Hist S
where DateAdded
<= convert(datetime, convert(varchar, Y.Year) + '0101', 112)
) S
where
S.RN = 1
) as S
pivot (
max (CTC) for year in ([2011],[2012],[2013],[2014],[2015])
) as P