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

Question

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;

Answer 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;