编译语句时出错：FAILED：SemanticException [错误 10036]：列名重复：p_id

Posted 2023-04-13

【中文标题】编译语句时出错：FAILED：SemanticException [错误 10036]：列名重复：p_id

【英文标题】：Error while compiling statement: FAILED: SemanticException [Error 10036]: Duplicate column name: p_id

【发布时间】：2018-03-09 15:00:54

【问题描述】：

当

SELECT * from hospital_basic 
LEFT JOIN hospital_clinical on hospital_basic.p_id=hospital_clinical.p_id;

工作正常，但创建视图时出现错误

CREATE VIEW hospital_view AS
SELECT * from hospital_basic LEFT JOIN 
hospital_clinical on hospital_basic.p_id=hospital_clinical.p_id;

【参考方案1】：

您需要为您选择的列添加一个别名，您不能这样做select *，因为列 p_id 将在表定义中重复

CREATE VIEW hospital_view AS 
SELECT 
hospital_basic.p_id as hospital_basic_p_id,
hospital_clinical.p_id as hospital_clinical_p_id,
other columns   ...
from hospital_basic LEFT JOIN hospital_clinical on hospital_basic.p_id=hospital_clinical.p_id;

【讨论】：

那么，如果两者都有20列，我必须全部写出来吗？

您可以使用正则表达式排除除一个以外的所有内容。 ***.com/questions/31666905/…