Using sub query in in group by sql server - sql

Question

Hello everyone I would like to use sub query as code bellow but it get error I would like to to ask you that I how can i do this. Thanks!
SELECT HR_EMPMAST.DEPT,HR_DEPARTMENT.DESCRIPTION AS DEPARTMENT,HR_JOBFUNCTION.CODE,HR_JOBFUNCTION.DESCRIPTION AS POSITION,
COUNT(HR_EMPMAST.EMPCODE) ACTUAL,
SUM(CASE WHEN HR_EMPMAST.SEX = 'M' THEN 1 ELSE 0 END) AS M,
SUM(CASE WHEN HR_EMPMAST.SEX = 'F' THEN 1 ELSE 0 END) AS F,SUM(CASE WHEN HR_EMPMAST.EMPTYPE='LOCAL' THEN 1 ELSE 0 END) AS LOCALEMP,
SUM(CASE WHEN HR_EMPMAST.EMPTYPE='EXPAT' THEN 1 ELSE 0 END) AS EXPATEMP--,
(SELECT EMPNO FROM HR_HEADCOUNT WHERE POSITION=HR_EMPMAST.JOBCODE AND INMONTH=1 AND INYEAR=2017) AS EMPNO
FROM HR_EMPMAST
LEFT JOIN HR_DEPARTMENT
ON HR_EMPMAST.DEPT = HR_DEPARTMENT.CODE
LEFT JOIN HR_JOBFUNCTION
ON HR_EMPMAST.JOBCODE=HR_JOBFUNCTION.CODE
WHERE HR_EMPMAST.CAREERDESC <> 'TERMIMATE'
GROUP BY HR_EMPMAST.DEPT,HR_DEPARTMENT.DESCRIPTION,HR_JOBFUNCTION.CODE,HR_JOBFUNCTION.DESCRIPTION

Answer 1

At first, please, use table aliases.
Second: you need to add ALL columns from SELECT to GROUP BY (but not ones in SUM and COUNT functions).
Third: you got strange EMPNO select. Maybe better way is to use JOIN?
Try to use this one:
SELECT e.DEPT,
d.DESCRIPTION AS DEPARTMENT,
jf.CODE,
jf.DESCRIPTION AS POSITION,
COUNT(e.EMPCODE) ACTUAL,
SUM(CASE WHEN e.SEX = 'M' THEN 1 ELSE 0 END) AS M,
SUM(CASE WHEN e.SEX = 'F' THEN 1 ELSE 0 END) AS F,
SUM(CASE WHEN e.EMPTYPE='LOCAL' THEN 1 ELSE 0 END) AS LOCALEMP,
SUM(CASE WHEN e.EMPTYPE='EXPAT' THEN 1 ELSE 0 END) AS EXPATEMP,
hc.EMPNO
FROM HR_EMPMAST e
LEFT JOIN HR_DEPARTMENT d
ON e.DEPT = d.CODE
LEFT JOIN HR_JOBFUNCTION jf
ON e.JOBCODE = jf.CODE
LEFT JOIN HR_HEADCOUNT hc
ON hc.POSITION = e.JOBCODE AND hc.INMONTH=1 AND hc.INYEAR=2017
WHERE e.CAREERDESC <> 'TERMIMATE'
GROUP BY e.DEPT,
d.DESCRIPTION,
jf.CODE,
jf.DESCRIPTION,
hc.EMPNO

Answer 2

Try this below query or include HR_EMPMAST.JOBCODE in group by clause...
SELECT HR_EMPMAST.DEPT,HR_DEPARTMENT.DESCRIPTION AS DEPARTMENT,HR_JOBFUNCTION.CODE,HR_JOBFUNCTION.DESCRIPTION AS POSITION,
COUNT(HR_EMPMAST.EMPCODE) ACTUAL,
SUM(CASE WHEN HR_EMPMAST.SEX = 'M' THEN 1 ELSE 0 END) AS M,
SUM(CASE WHEN HR_EMPMAST.SEX = 'F' THEN 1 ELSE 0 END) AS F,SUM(CASE WHEN HR_EMPMAST.EMPTYPE='LOCAL' THEN 1 ELSE 0 END) AS LOCALEMP,
SUM(CASE WHEN HR_EMPMAST.EMPTYPE='EXPAT' THEN 1 ELSE 0 END) AS EXPATEMP,
em.EMPNO AS EMPNO
FROM HR_EMPMAST
LEFT JOIN (SELECT POSITION, EMPNO FROM HR_HEADCOUNT WHERE INMONTH=1 AND INYEAR=2017) em on em.POSITION=HR_EMPMAST.JOBCODE
LEFT JOIN HR_DEPARTMENT
ON HR_EMPMAST.DEPT = HR_DEPARTMENT.CODE
LEFT JOIN HR_JOBFUNCTION
ON HR_EMPMAST.JOBCODE=HR_JOBFUNCTION.CODE
WHERE HR_EMPMAST.CAREERDESC <> 'TERMIMATE'
GROUP BY HR_EMPMAST.DEPT,HR_DEPARTMENT.DESCRIPTION,HR_JOBFUNCTION.CODE,HR_JOBFUNCTION.DESCRIPTION