我想把1997-01-25前3天内没有销售的员工,拿到 "美国 "来的客户。
订单表
OrderID CustomerName EmployeeId Orderdate
10248 C1 1 1997-01-25 00:00:00:000
10249 C2 3 1997-0-24 00:00:00:000
10250 C3 2 1997-01-23 00:00:00:000
10251 c4 5 1997-01-22 00:00:00:000
10251 c5 4 1997-01-23 00:00:00:000
雇员
EmployeeID Emp_name
1 E1
2 E2 and so on till e5
客户
CustomerID Country
C1 USA
C2 UK
C3 Brazil
C4 UK
C5 USA
期望的结果
EmployeeID
2
3
5
查询次数
select EmployeeID
from Employees e1
where employeeid not in
(
select o.EmployeeID
from orders o
full join customers c on o.CustomerID=c.CustomerID
where c.Country = 'USA'
and o.RequiredDate >= dateadd(day,-3, '1997-01-25')
)
但是我得到的结果是空白的,因为没有行。(这只是一个样本):数据来自北风数据库。我刚刚创建了样本数据,以防有人没有北风数据库。
完全根据你 "提供 "的表数据,问题是你要找的是一个整数的Employee id,而你的子查询返回的是一个员工姓名列表。 所以如果你按照这样的方式修改,就会得到正确的答案。
CREATE TABLE #Orders (OrderID int, CustomerName varchar(20), EmployeeName varchar(20), Orderdate datetime)
INSERT INTO #Orders VALUES
(10248, 'C1', 'E1', '1997-01-25 00:00:00:000'),
(10249, 'C2', 'E3', '1997-01-24 00:00:00:000'),
(10250, 'C3', 'E2', '1997-01-23 00:00:00:000'),
(10251, 'c4', 'e5', '1997-01-22 00:00:00:000'),
(10251, 'c5', 'e4', '1997-01-23 00:00:00:000')
CREATE TABLE #Employees (EmployeeID int, Emp_name varchar(10))
INSERT INTO #Employees VALUES
(1, 'E1'),
(2, 'E2'),
(3, 'E3'),
(4, 'E4'),
(5, 'E5')
CREATE TABLE #Customers (CustomerID varchar(10), Country varchar(20))
INSERT INTO #Customers VALUES
('C1', 'USA'),
('C2', 'UK'),
('C3', 'Brazil'),
('C4', 'UK' ),
('C5', 'USA')
select Emp_name
from #Employees e1
where Emp_name not in
(
select o.EmployeeName
from #orders o
inner join #customers c on o.CustomerName = c.CustomerID
where c.Country = 'USA'
and o.Orderdate >= dateadd(day,-3, '1997-01-25')
)
SELECT DISTINCT Employees.Emp_name
FROM Employees
LEFT JOIN Orders ON Orders.EmployeeID = Employees.EmployeeID AND Orders.Orderdata BETWEEN '1997-01-23' AND '1997-01-25'
LEFT JOIN Customers ON Customers.CustomerID = Orders.CustomerID AND Customers.Country = 'USA'
AND Customers.CustomerID IS NULL