Você vai querer usar um
PIVOT função para isso. Se você tiver um número conhecido de colunas, poderá codificar os valores:select name, [Bronze], [Silver], [Gold], [Platinum], [AnotherOne]
from
(
select c.name,
cr.description,
r.typeid
from customers c
left join rewards r
on c.id = r.customerid
left join customerrewards cr
on r.typeid = cr.typeid
) x
pivot
(
count(typeid)
for description in ([Bronze], [Silver], [Gold], [Platinum], [AnotherOne])
) p;
Consulte SQL Fiddle com demonstração.
Agora, se você tiver um número desconhecido de colunas, poderá usar SQL dinâmico para
PIVOT :DECLARE @cols AS NVARCHAR(MAX),
@query AS NVARCHAR(MAX)
select @cols = STUFF((SELECT ',' + QUOTENAME(description)
from customerrewards
group by description, typeid
order by typeid
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set @query = 'SELECT name,' + @cols + ' from
(
select c.name,
cr.description,
r.typeid
from customers c
left join rewards r
on c.id = r.customerid
left join customerrewards cr
on r.typeid = cr.typeid
) x
pivot
(
count(typeid)
for description in (' + @cols + ')
) p '
execute(@query)
Veja SQL Fiddle com demonstração
Se você precisar incluir o
Total coluna, então você pode usar ROLLUP (Demonstração da versão estática):select name, sum([Bronze]) Bronze, sum([Silver]) Silver,
sum([Gold]) Gold, sum([Platinum]) Platinum, sum([AnotherOne]) AnotherOne
from
(
select name, [Bronze], [Silver], [Gold], [Platinum], [AnotherOne]
from
(
select c.name,
cr.description,
r.typeid
from customers c
left join rewards r
on c.id = r.customerid
left join customerrewards cr
on r.typeid = cr.typeid
) x
pivot
(
count(typeid)
for description in ([Bronze], [Silver], [Gold], [Platinum], [AnotherOne])
) p
) x
group by name with rollup
Versão dinâmica (Demo):
DECLARE @cols AS NVARCHAR(MAX),
@colsRollup AS NVARCHAR(MAX),
@query AS NVARCHAR(MAX)
select @cols = STUFF((SELECT ',' + QUOTENAME(description)
from customerrewards
group by description, typeid
order by typeid
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
select @colsRollup
= STUFF((SELECT ', Sum(' + QUOTENAME(description) + ') as '+ QUOTENAME(description)
from customerrewards
group by description, typeid
order by typeid
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set @query
= 'SELECT name, '+ @colsRollup + '
FROM
(
SELECT name,' + @cols + ' from
(
select c.name,
cr.description,
r.typeid
from customers c
left join rewards r
on c.id = r.customerid
left join customerrewards cr
on r.typeid = cr.typeid
) x
pivot
(
count(typeid)
for description in (' + @cols + ')
) p
) x1
GROUP BY name with ROLLUP'
execute(@query)
