Search notes:
Oracle SQL: UNION ALL
union all
is a
set operator
.
See also
union
Combining
union all
with a
with
clause
.
union all
and
order by
The error message
ORA-00904: invalid identifier
as result of combining
union all
with
order by
.
The
join factorization
query tranformation
.
The
plan operation
UNION ALL
.
Set operators
ORA-01789: query block has incorrect number of result columns
Index