MySQL Workbench 报告错误代码：MySQL 中的 1064

Question

SELECT OrderID, OrderDate, Freight 
FROM orders 
WHERE CustomerID IN (SELECT CustomerID FROM WHERE City in ('Germany', 'Mexico', 'Spain')) 
ORDER BY Freight DESC;

Answer 1

您的内部 SELECT 子句有一个 from 没有表。

我添加了orders2作为表名，因为我不知道你到底在想什么

SELECT OrderID, OrderDate, Freight 
FROM orders 
WHERE CustomerID IN (SELECT CustomerID FROM orders2 WHERE City in ('Germany', 'Mexico', 'Spain')) 
ORDER BY Freight DESC;

Answer 2

问题不清楚，但如果只涉及一张表，我认为这是一个简单的表格。

SELECT OrderID, OrderDate, Freight 
FROM orders 
WHERE  City IN ('Germany', 'Mexico', 'Spain')) 
ORDER BY Freight DESC;

或者如果有两张桌子

SELECT a.OrderID, a.OrderDate, a.Freight 
FROM orders a, orders2 b
WHERE a.CustomerID=b.CustomerID AND b.city IN ('Germany', 'Mexico', 'Spain')) 
ORDER BY a.Freight DESC;

也可以使用连接。