如何在SQL Server中使用“日期”数据类型？

Question

朋友您好，当我尝试在数据类型为“日期”的表中创建列时，它给我错误，我无法在此处添加它，这是我的代码Create table Orders (Order_ID INT Primary Key,Book_name varchar(100) ,isbn varchar(100) ,Customer_ID INT Foreign key references Customer,Order_date date,);我还需要另一件事来获取某个东西的日期，然后再创建它更清楚地说：询问的查询指示查找8月2日之前的日期我该怎么做我试图像这样输入数据Insert Into Orders(Order_ID, Book_name, isbn, Customer_ID, Order_date) values (1, 'Design User Interface',9345678210123, 1, '02-08-2015'); Insert Into Orders(Order_ID, Book_name, isbn, Customer_ID, Order_date) values (2, 'Fire',9654693261489, 1, '05-08-2015'); Insert Into Orders(Order_ID, Book_name, isbn, Customer_ID, Order_date) values (3, 'The Odyssey',9654864332511, 2, '01-08-2015'); Insert Into Orders(Order_ID, Book_name, isbn, Customer_ID, Order_date) values (4, 'Anatomy',9654877777755, 2, '30-07-2015'); Insert Into Orders(Order_ID, Book_name, isbn, Customer_ID, Order_date) values (5, 'Surgery',9654864951753, 2, '01-07-2015'); 但是，它只接受前3个插入，后两个却给我错误：/