Get Max and Min of 2 Columns SQL Server 2008 R2 - sql

Question

This query is the final part of a store procedure that manages to show me the results in this way:
;with final_comparativo as (
select s.CeEmplazamiento, avg(s.Totales) TotalGeneral , s2.TotGral, #Mes as Mes
from tmpSemanas s
cross join ( select avg(Totales) TotGral from tmpSemanas s2 where Totales >0) s2
group by s.CeEmplazamiento , s2.TotGral
union all
select ss.CeEmplazamiento, avg(ss.Totales) TotalGeneral , ss2.TotGral, #Mes_comparar as Mes
from tmpSemanas_comparar ss
cross join ( select avg(Totales) TotGral from tmpSemanas_comparar ss2 where Totales >0) ss2
group by ss.CeEmplazamiento , ss2.TotGral
)
--insert #tmpDatos
, maximo_minimo as (
select CeEmplazamiento,
max(case when Mes = #Mes then TotalGeneral else 0 end) as Mes_actual,
max(case when Mes = #Mes_comparar then TotalGeneral else 0 end) as Mes_comparar
from final_comparativo
where TotalGeneral <> 0
group by CeEmplazamiento
)
select * from maximo_minimo
drop table #tmpDatos
This is the current result table
CeEmplazamiento Month_current Month_compare
Celaya 76.500000 75.600000
Coecillo 79.000000 79.800000
Irapuato 77.500000 75.400000
León Sur 85.750000 87.600000
Oriente León 86.250000 85.200000
The store procedure asks you for 2 arguments corresponding to month_current (month of origin) month_compare (against which month you want to compare the month_current) so it is already a final calculation. But my problem lies in the following, I want this table to take the maximum and minimum of the current month and likewise for the column "Month_compare", I hope I have explained. More briefly, I would like it to remain this way.
CeEmplazamiento Month_current Month_compare
Leon Sur 85.75 87.60
Celaya 76.50 null
Irapuato null 75.40
As far as you can tell, it is not the same amount for all CeEsmplazamiento, those that are not in the current Month, are not shown but are taken into account for a graphic that is being done. I hope you can help me

Answer 1

Smth like this:
declare #t table(CeEmplazamiento varchar(100), Month_current money, Month_compare money);
insert into #t values
('Celaya', 76.500000, 75.600000),
('Coecillo', 79.000000, 79.800000),
('Irapuato', 77.500000, 75.400000),
('León Sur', 85.750000, 87.600000),
('Oriente León', 86.250000, 85.200000);
with cte1 as
(
select top 1 CeEmplazamiento, Month_current, null as Month_compare
from #t
order by Month_current asc
)
,cte2 as
(
select top 1 CeEmplazamiento, Month_current, null as Month_compare
from #t
order by Month_current desc
)
,cte3 as
(
select top 1 CeEmplazamiento, null as Month_current, Month_compare
from #t
order by Month_compare asc
)
,cte4 as
(
select top 1 CeEmplazamiento, null as Month_current, Month_compare
from #t
order by Month_compare desc
)
select *
from cte1
union all
select *
from cte2
union all
select *
from cte3
union all
select *
from cte4