możesz podać aliasy do nowych kolumn w pivot
IN
wyciągu klauzula. (Uwaga:różni się to od standardu, w którym klauzula IN()
który nie zezwala na aliasy.)
with testdata as
(
select 'Fred' First_Name, 10 Items from dual
union
select 'John' First_Name, 5 Items from dual
union
select 'Jane' First_Name, 12 Items from dual
union
select 'Fred' First_Name, 15 Items from dual
)
select * from testdata
pivot (
sum(Items)
for First_Name
in ('Fred' as fred,'John' as john,'Jane' as jane)
)
a także dla klauzuli zbiorczej, która jest konieczna, jeśli masz wiele klauzul.
with testdata as
(
select 'Fred' First_Name, 10 Items from dual
union
select 'John' First_Name, 5 Items from dual
union
select 'Jane' First_Name, 12 Items from dual
union
select 'Fred' First_Name, 15 Items from dual
)
select * from testdata
pivot (
sum(Items) itmsum,
count(Items) itmcnt
for First_Name
in ('Fred' as fred,'John' as john,'Jane' as jane)
)
powraca
FRED_ITMSUM FRED_ITMCNT JOHN_ITMSUM JOHN_ITMCNT JANE_ITMSUM JANE_ITMCNT
----------- ----------- ----------- ----------- ----------- -----------
25 2 5 1 12 1
Oczywiście możesz wtedy zatoczyć pełne koło i użyć standardowego aliasowania wyroczni i zmienić ich nazwy na dowolne, w tym ponownie wstawić cytaty.
with testdata as
(
select 'Fred' First_Name, 10 Items from dual
union
select 'John' First_Name, 5 Items from dual
union
select 'Jane' First_Name, 12 Items from dual
union
select 'Fred' First_Name, 15 Items from dual
)
select FRED_ITMSUM "Fred's Sum", FRED_ITMCNT "Fred's Count"
, JOHN_ITMSUM "John's Sum", JOHN_ITMCNT "John's Count"
, JANE_ITMSUM "Janes's Sum", JANE_ITMCNT "Janes's Count"
from testdata
pivot (
sum(Items) itmsum,
count(Items) itmcnt
for First_Name
in ('Fred' as fred,'John' as john,'Jane' as jane)
)
daje
Fred's Sum Fred's Count John's Sum John's Count Janes's Sum Janes's Count
---------- ------------ ---------- ------------ ----------- -------------
25 2 5 1 12 1