mysql - 编译语句 : FAILED: SemanticException [Error 10036]: Duplicate column name: p_id 时出错

Question

当

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

它工作正常，但在创建 View 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设置一个别名，您不能执行 select * 因为列 p_id 将被重复用于表定义

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;