题目描述
针对actor表创建视图actor_name_view,只包含first_name以及last_name两列,
并且这两列重新命名,first_name为first_name_v,last_name修改为last_name_v:
CREATE TABLE IF NOT EXISTS actor(
actor_id smallint(5)NOT NULL PRIMARY KEY,
first_name varchar(45)NOT NULL,
last_name varchar(45)NOT NULL,
last_update timestamp NOT NULL DEFAULT(datetime('now','localtime')))
解决思路
- 方法一:注意 CREATE VIEW … AS … 的 AS 是创建视图语法中的一部分,而后面的两个 AS 只是为字段创建别名
CREATE VIEW actor_name_view AS
SELECT first_name AS fist_name_v, last_name AS last_name_v
FROM actor
- 方法二:直接在视图名的后面用小括号创建视图中的字段名
CREATE VIEW actor_name_view (fist_name_v, last_name_v) AS
SELECT first_name, last_name FROM actor