Manipulate results to display rows as columns

Question

I have two tables. Table A contains a list of departments, there are 20 in total.

See image

Answer 1

SELECT
  A.DEPTNAME,
  (SELECT COUNT(*) FROM TABLEA A2 INNER JOIN TABLEB B ON B.TableAID = A2.TableAID WHERE B.EMPLOYEE_CLASS = 'Full time' AND A2.TableAID = A.TableAID) FullTimeNo,
  (SELECT COUNT(*) FROM TABLEA A2 INNER JOIN TABLEB B ON B.TableAID = A2.TableAID WHERE B.EMPLOYEE_CLASS = 'Part time' AND A2.TableAID = A.TableAID) PartTimeNo
FROM
  TABLEA

Answer 2

You want a PIVOT

select *
from (tableb) s
pivot (Max(staffno) for employee_class in ([Full Time],[Part Time])) p

Answer 3

Try this:

select A.DEPTNAME, 
       sum(case when B.EMPLOYEE_CLASS='Full time' then B.STAFF_NO else 0) as FullTimeNo,
       sum(case when B.EMPLOYEE_CLASS='Part time' then B.STAFF_NO else 0) as PartTimeNo,
from TabA A
join TabB B on A.DEPTNAME=B.DEPTNAME
group by A.DEPTNAME