Calculate Days Present and absent from the table - sql

Question

I have a table name Emp_mon_day which consists Employees Present and Absent details.
What I want is
I need for these 9 employees, information about days present and days absent for each employees from Emp_mon_day table merged in to below query
QUERY
SELECT e.comp_mkey,
e.status,
e.resig_date,
dt_of_leave,
e.emp_name,
e.date_of_joining,
e.emp_card_no,
a.pl_days,
pl_days_opening,
a.month1,
a.month2,
a.month3,
a.month4,
a.month5,
a.month6,
a.month7,
a.month8,
a.month9,
a.month10,
a.month11,
a.month12,
a.month1 + a.month2 + a.month3 + a.month4 + a.month5 + a.month6 + a.month7 + a.month8 + a.month9 + +a.month10 + a.month11 + a.month12 AS pl_sum
FROM p_leave_allocation AS a
INNER JOIN
emp_mst AS e
ON a.emp_card_no = e.emp_card_no
WHERE a.year = 2016
AND (datediff(MONTH, e.date_of_joining, CONVERT (DATETIME, getdate(), 103)) >= 6
AND datediff(MONTH, e.date_of_joining, CONVERT (DATETIME, getdate(), 103)) <= 36)
AND (e.resig_date IS NULL
OR (e.dt_of_leave IS NOT NULL
AND e.dt_of_leave >= CONVERT (DATETIME, getdate(), 103)))
AND e.status IN ('A', 'S')
AND e.comp_mkey IN (7, 110)
AND a.Year = 2016;
The above query gives me data as below
[![Image data][1]][1]
Column details for Emp_mon_day is below
[![enter image description here][2]][2]

Answer 1

You can try the below query:
SELECT e.comp_mkey, e.status, e.resig_date, dt_of_leave, e.emp_name,
e.date_of_joining, e.emp_card_no, a.pl_days, pl_days_opening, a.month1,
a.month2, a.month3, a.month4, a.month5, a.month6, a.month7, a.month8,
a.month9, a.month10, a.month11, a.month12,
a.month1 + a.month2 + a.month3 + a.month4 + a.month5 + a.month6 + a.month7 + a.month8 + a.month9 + +a.month10 + a.month11 + a.month12 AS pl_sum,
m.[DaysAbsent],m.[DaysPresent]
FROM p_leave_allocation AS a
INNER JOIN
emp_mst AS e
ON a.emp_card_no = e.emp_card_no
INNER JOIN
(
SELECT
comp_mkey,emp_mkey,[month],[year],
SUM(CASE WHEN data ='AB' THEN 1 ELSE 0 END) AS [DaysAbsent],
SUM(CASE WHEN data ='P' THEN 1 ELSE 0 END) AS [DaysPresent]
FROM
(
SELECT comp_mkey,emp_mkey,[month],[year],[Day1],[Day2],[Day3],[Day4],[Day5]
--,...
FROM Emp_mon_day
) source
UNPIVOT
(
data FOR day IN ([Day1],[Day2],[Day3],[Day4],[Day5]) -- dynamic query can generate all days data
)up
GROUP BY comp_mkey, emp_mkey,[month],[year]
) AS m
ON m.comp_mkey=e.Comp_mkey and m.emp_mkey=e.mkey
--- ABOVE CRITERIA NEEDS TO BE CHECKED
WHERE a.year = 2016
AND (datediff(MONTH, e.date_of_joining, CONVERT (DATETIME, getdate(), 103)) >= 6
AND datediff(MONTH, e.date_of_joining, CONVERT (DATETIME, getdate(), 103)) <= 36)
AND (e.resig_date IS NULL
OR (e.dt_of_leave IS NOT NULL
AND e.dt_of_leave >= CONVERT (DATETIME, getdate(), 103)))
AND e.status IN ('A', 'S')
AND e.comp_mkey IN (7, 110)
AND a.Year = 2016;
Explanation:
We've added another INNER JOIN to the existing query to get collated data of DaysPresent and DaysAbsent
To optimize this further, I'd suggest you directly apply following WHERE clause to source set
WHERE comp_mkey IN (7, 110) AND Year = 2016;