嵌套连接隐藏表名

Question

我有三个表:供应商,零件和类型.我需要加入所有这些,同时在三个表中区分具有相同名称的列(例如,"id").我想成功运行此查询:

CREATE VIEW Everything AS
SELECT Suppliers.name as supplier, 
       Parts.id, 
       Parts.description, 
       Types.typedesc as type
FROM Suppliers JOIN (Parts JOIN Types ON Parts.type_id = Types.id)
ON Suppliers.id = Parts.supplier_id;

我的DBMS(sqlite)抱怨"没有这样的列(Parts.id)".我想在JOIN完成后会忘记表名,但是我怎样才能引用id属于表的列Parts呢？

Answer 1

您的ANSI-92 JOIN语法不正确 - 使用:

CREATE VIEW Everything AS
  SELECT Suppliers.name as supplier, 
         Parts.id, 
         Parts.description, 
         Types.typedesc as type
    FROM Suppliers 
    JOIN Parts ON Suppliers.id = Parts.supplier_id
    JOIN Types ON Parts.type_id = Types.id