ORA-00998: 必须用列别名命名此表达式。在不同的架构中它有效

Question

我正在 oracle 中移植应用程序，我有一个工作视图代码：

CREATE OR REPLACE FORCE VIEW "MyNewSchema.SPECIAL_APPROVERS_VW" ("NAME", "ID", "PERSON_NUMBER", "USER_NAME", "BUSINESS_UNIT_ID", "BUSINESS_UNIT_NAME", "ROW_TYPE") AS
select e.FULL_NAME, e.PERSON_ID, e.PERSON_NUMBER, null, e.ORGANIZATION_ID, d.NAME, 'E'
  from MyNewSchema.EMPLOYEES_IMPORT e
  join MyNewSchema.DEPARTMENTS_IMPORT d on d.ORGANIZATION_ID = e.ORGANIZATION_ID
union all
select d.NAME, d.ORGANIZATION_ID, DEPARTMENT_ID, null, null, null, 'D'
from MyNewSchema.DEPARTMENTS_IMPORT d

为什么它在另一个架构中工作，但是当我将表迁移到 MyNewSchema 时它不起作用并且我收到这样的错误：

Compilation failed,line 0 (10:36:04)
ORA-00998: must name this expression with a column alias

Answer 1

我认为这会起作用：

CREATE OR REPLACE FORCE VIEW SPECIAL_APPROVERS_VW ("NAME", "ID", "PERSON_NUMBER", "USER_NAME", "BUSINESS_UNIT_ID", "BUSINESS_UNIT_NAME", "ROW_TYPE") AS
select e.FULL_NAME, e.PERSON_ID, e.PERSON_NUMBER, null, e.ORGANIZATION_ID, d.NAME, 'E'
  from EMPLOYEES_IMPORT e
  join DEPARTMENTS_IMPORT d on d.ORGANIZATION_ID = e.ORGANIZATION_ID
union all
select d.NAME, d.ORGANIZATION_ID, DEPARTMENT_ID, null, null, null, 'D'
from DEPARTMENTS_IMPORT d

正如您所提到的，您现在拥有此模式中的所有表，并且您正在该模式中创建视图...

ORA-00998: 必须用列别名命名此表达式。在不同的架构中它有效

ORA-00998: must name this expression with a column alias. In a different schema it works

sql

oracle

sql-view