Question

使用逻辑运算符：AND，OR，编写一个返回1996年7月下达的订单的查询作者：Nancy Davolio，Janet Leverling和Steven Buchanan。列出订单ID，员工ID和订单日期。由employeeID订购结果集。 Northwind数据库

Answer 1

SELECT O.OrderID
      ,E.EmployeeID
      ,O.OrderDate 
FROM dbo.Orders O INNER JOIN dbo.Employees E
ON O.EmployeeID = E.EmployeeID
WHERE YEAR(O.OrderDate) = 1996
 AND  MONTH(O.OrderDate)= 7
 AND E.FirstName IN ('Nancy','Janet', 'Steven')

严格使用AND和OR运算符

SELECT O.OrderID
      ,E.EmployeeID
      ,O.OrderDate 
FROM dbo.Orders O INNER JOIN dbo.Employees E
ON O.EmployeeID = E.EmployeeID
WHERE YEAR(O.OrderDate) = 1996
 AND  MONTH(O.OrderDate)= 7
 AND 
     (   E.FirstName = 'Nancy'
      OR E.FirstName = 'Janet'
      OR E.FirstName =  'Steven'
     )

需要帮助编写此查询

1 个答案: