在sql中使用内连接创建表

Question

我应该使用内部连接和另一个表在 sql 中创建一个表。我提出了这样一个解决方案，但 MySQL Workbench 一直告诉我我的 SQL 语法有错误。我没有任何想法。如果有人能帮助我，我将不胜感激。

 CREATE TABLE BigTable AS( 
 SELECT
    ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPrice, UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued
 FROM `northwind`.`products`
 INNER JOIN(
     SELECT 
        CustomerID, EmployeeID, OrderDate, RequiredDate, ShipVia, Freight, ShipName, ShipAddress, ShipCity, ShipRegion, ShipPostalCode, ShipCountry, ProductID, UnitPrice, Quantity, Discount 
     FROM `northwind`.`orders` 
     INNER JOIN `northwind`.`order_details`
     ON orders.OrderID=order_details.OrderID) AS products
 INNER JOIN(
     SELECT
        LastName, FirstName ,Title ,TitleOfCourtesy ,BirthDate ,HireDate ,Address ,City , Region, PostalCode, Country, HomePhone, Extension, Photo, Notes, ReportsTo, CompanyName,ContactName,ContactTitle,Address,City,Region,PostalCode,Country,Phone,Fax,
     FROM `northwind`.`employees`
     INNER JOIN `northwind`.`customers`) AS People));

Answer 1

去掉外面的括号。应该是：

CREATE TABLE BigTable AS
SELECT
    ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPrice, UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued
FROM `northwind`.`products`
INNER JOIN(
    SELECT 
        CustomerID, EmployeeID, OrderDate, RequiredDate, ShipVia, Freight, ShipName, ShipAddress, ShipCity, ShipRegion, ShipPostalCode, ShipCountry, ProductID, UnitPrice, Quantity, Discount 
    FROM `northwind`.`orders` 
    INNER JOIN `northwind`.`order_details`
    ON orders.OrderID=order_details.OrderID) AS products
INNER JOIN(
    SELECT
        LastName, FirstName ,Title ,TitleOfCourtesy ,BirthDate ,HireDate ,Address ,City , Region, PostalCode, Country, HomePhone, Extension, Photo, Notes, ReportsTo, CompanyName,ContactName,ContactTitle,Address,City,Region,PostalCode,Country,Phone,Fax
    FROM `northwind`.`employees`
    INNER JOIN `northwind`.`customers`) AS People;

你还有不匹配的括号，因为你在末尾有两个 )) 与开头的 ( 匹配，并且在 Fax 之后有一个额外的 ,。

这些将修复语法错误。但看起来您也有逻辑错误，因为您的大多数 INNER JOIN 子句都缺少关联表的 ON 条件。而且您选择了许多您从未使用过的列。