MySql - 创建视图时遇到问题

Question

尝试在 MySql 中创建视图时收到此消息。我也尝试为每一列赋予别名，但仍然收到错误消息。怎么回事！？提前致谢。

错误信息

错误 1060：列名“ID”重复

代码

CREATE VIEW contactnotes AS
SELECT contact.ID, log.ID, contact.Name, log.notes
FROM log 
JOIN contact 
ON log.ID = contact.ID

别名尝试

CREATE VIEW contactnotes AS
SELECT contact.ID as id1, log.ID as id2, contact.Name, log.notes
FROM log 
JOIN contact 
ON id1 = id2

Answer 1

CREATE VIEW contactnotes AS
SELECT contact.ID as id1, log.ID as id2, contact.Name, log.notes
FROM log 
JOIN contact 
ON log.ID = contact.ID

或

CREATE VIEW contactnotes AS
SELECT contact.ID as id1, log.ID as id2, contact.Name, log.notes
FROM log 
INNER JOIN contact USING (ID)