#sql #oracle10g #identifier
#sql #oracle10g #идентификатор
Вопрос:
Почему sql ниже не работает?
select
a.field1, a.field2, a.field3,
(select count(*)
from table2 b
where b.field1 = a.field1
) as field4,
(select count(*)
from table3 b
where b.field1 = a.field1
) as field5,
(select count(*)
from table4 b
where b.field1 = a.field1
) as field6,
from table1 a
order by field4
Oracle сообщает: ORA-00904: «field4»: недопустимый идентификатор
Ответ №1:
попробуйте завершить это
select * from
(
select
a.field1, a.field2, a.field3,
(select count(*)
from table2 b
where b.field1 = a.field1
) as field4,
(select count(*)
from table3 b
where b.field1 = a.field1
) as field5,
(select count(*)
from table4 b
where b.field1 = a.field1
) as field6,
from table1 a
)
order by field4