Question

我正在以下列方式创建视图

CREATE OR REPLACE FORCE VIEW tableA (field1, field2)
AS
  SELECT 
    CAST("state" AS        CHAR(2)),
    CAST("LOCALITY_NAME" AS   CHAR(31)),
  FROM tableB;

我需要再添加一个名为'id'的列，并用所有行的硬编码值'abc'填充它。在创建视图时是否可以这样做？我见过this thread，但我无法理解它是如何适合我的情况。

Answer 1

SELECT 'abc' as id,
        CAST("state" AS CHAR(2)),
        CAST(LOCALITY_NAME AS CHAR(31)),
FROM tableB

Answer 2

当然，只需将其添加为常量值：

CREATE OR REPLACE FORCE VIEW tableA (field1, field2)
AS
  SELECT
    CAST("state" AS        CHAR(2)),
    CAST("LOCALITY_NAME" AS   CHAR(31)),
    'abc' AS id 
  FROM tableB;

使用硬编码值创建视图而无需编写插入

2 个答案: