Case Statement Questions regarding column names - sql

Question

In the following, I have a case statement. I am wondering if it's possible to have three separate columns in this case statement. Obviously, the 'else end' statement provides the 'Dependents', 'Employees', and 'Spouse' in a 'Relationship' column. I am looking to have 'Employee', 'Spouse', and 'Dependent' to be in their own column.
select
Convert (varchar(6),x.mem_date,112) as IncurMonth,
e.Meme_lev2 as Group#,
e.MEME_GRPN as Groupname,
--MONTH(x.mem_date) AS mem_date,
case when m.mem_rel = '01' then 'Employee'
when m.mem_rel = '02' then 'Spouse'
--when m.MEM_REL = '03' then 'Child'
--when m.MEM_REL = '04' then 'Child/No Financial Resp.'
--when m.MEM_REL = '05' then 'Step child'
--when m.MEM_REL = '06' then 'Foster child'
--when m.MEM_REL = '07' then 'Guardian/POA'
else 'Dependent' end as Relationship,
COUNT(*) as "Members/Subscribers"
from Impact.dbo.tbl_mem m
left join Impact.dbo.tbl_meme e on e.MEME_ID1 = m.MEM_ID1
inner join impactwork.dbo.tbl_mmonth x on x.mem_date between convert(varchar(10), e.meme_eff, 101) and convert(varchar(10), e.meme_trm, 101)
where e.MEME_LEV2 IN ('52032')
and x.mem_date between '01/01/2015' and '03/31/2015'
and meme_rank='900'
group by
e.Meme_lev2,
e.MEME_GRPN,
Convert (varchar(6),x.mem_date,112),
case when m.mem_rel = '01' then 'Employee'
when m.mem_rel = '02' then 'Spouse'
--when m.MEM_REL = '03' then 'Child'
--when m.MEM_REL = '04' then 'Child/No Financial Resp.'
--when m.MEM_REL = '05' then 'Step child'
--when m.MEM_REL = '06' then 'Foster child'
--when m.MEM_REL = '07' then 'Guardian/POA'
else 'Dependent' end
order by group#, Convert (varchar(6),x.mem_date,112), [members/subscribers] desc
IncurMonth Group# Groupname Relationship Members/Subscribers
201501 52005 Rosco LABORATORIES Employee 30
201501 52005 Rosco LABORATORIES Dependent 32
201501 52005 Rosco LABORATORIES Spouse 14
201501 52005 Rosco LABORATORIES RETIREE AR Employee 17
201501 52005 Rosco LABORATORIES RETIREE AR Spouse 6

Answer 1

You can use conditional aggregation to do this. Replace your case statement with an aggregate function with a conditional expression as argument (so that you only count the rows matching the expression).
I used sum below, but you could just as well use count:
count(case when m.mem_rel = '01' then m.mem_rel end) 'Employee',
also remove the expression from the group by clause as you're now using it as an aggregate and should not group by it.
select
Convert(varchar(6),x.mem_date,112) as IncurMonth,
e.Meme_lev2 as Group#,
e.MEME_GRPN as Groupname,
--MONTH(x.mem_date) AS mem_date,
sum(case when m.mem_rel = '01' then 1 else 0 end) 'Employee',
sum(case when m.mem_rel = '02' then 1 else 0 end) 'Spouse',
sum(case when m.MEM_REL NOT IN ('01','02') then 1 else 0 end) 'Dependent',
COUNT(*) as "Members/Subscribers"
from Impact.dbo.tbl_mem m
left join Impact.dbo.tbl_meme e on e.MEME_ID1 = m.MEM_ID1
inner join impactwork.dbo.tbl_mmonth x on x.mem_date between convert(varchar(10), e.meme_eff, 101)
and convert(varchar(10), e.meme_trm, 101)
where e.MEME_LEV2 IN ('52032')
and x.mem_date between '01/01/2015' and '03/31/2015'
and meme_rank='900'
group by
e.Meme_lev2,
e.MEME_GRPN,
Convert(varchar(6),x.mem_date,112)
order by group#, Convert(varchar(6),x.mem_date,112), [members/subscribers] desc;