我有一张销售表,但不包括销售地区。我也有一张表格,根据销售人员的地区和日期将他们分配给我们。我想加入表格,以便可以抓住该区域并将其包含在我的销售表中。
我加入了销售人员的姓名首字母(键),但我也想将销售日期与地区开始和地区停止进行比较,以加入正确的地区。我尝试使用开始日期和结束日期之间的销售日期,但这没有用,因为如果它们仍在该区域中,则它会提供NULL值。
感谢您的帮助,布伦特
IF NOT EXISTS (
select * from sysobjects where name='sales' and xtype='U'
)CREATE TABLE sales (
[Sale_Date] DATETIME,
[Sales_Person] NVARCHAR(3),
[Sales_Amount] INT,
[Region] INT
);
INSERT INTO sales VALUES
('2016-07-01 00:00:00',N'MDD',152,NULL),
('2016-09-21 00:00:00',N'MDD',278,NULL),
('2018-03-01 00:00:00',N'STE',385,NULL),
('2018-04-01 00:00:00',N'MDD',426,NULL),
('2019-02-25 00:00:00',N'MDD',224,NULL),
('2020-02-15 00:00:00',N'STE',261,NULL),
('2020-03-01 00:00:00',N'STE',480,NULL),
('2020-06-05 00:00:00',N'BBB',245,NULL),
('2020-07-05 00:00:00',N'BBB',178,NULL);
IF NOT EXISTS (
select * from sysobjects where name='SalesPersonAssignment' and xtype='U'
) CREATE TABLE SalesPersonAssignment (
[sales_person] NVARCHAR(4),
[Region_ID] INT,
[Region_Name] NVARCHAR(6),
[Region_Start_Date] DATETIME,
[Region_Stop_Date] NVARCHAR(10)
);
INSERT INTO SalesPersonAssignment VALUES
(N'MDD',2,N'North ','2015-01-05 00:00:00',N'12/31/2017'),
(N'MDD',6,N'West','2018-01-01 00:00:00',N'NULL'),
(N'STE ',6,N'West','2018-10-02 00:00:00',N'12/31/2019'),
(N'STE',2,N'North ','2020-01-01 00:00:00',N'NULL'),
(N'BBB',1,N'South','2019-01-01 00:00:00',N'NULL');
Select s.Sale_Date, s.Sales_Amount, s.Sales_Person, spa.Region_Name
FROM sales s LEFT OUTER JOIN SalesPersonAssignment spa ON s.Sales_Person = spa.sales_person
--join based on the sales date and region's start/stop date of the sales person
答案 0 :(得分:0)
您将日期存储为字符串。并且时间部分是不必要的。更好的方法是:
CREATE TABLE SalesPersonAssignment (
[sales_person] NVARCHAR(4),
[Region_ID] INT,
[Region_Name] NVARCHAR(6),
[Region_Start_Date] DATE,
[Region_Stop_Date] DATE
);
INSERT INTO SalesPersonAssignment VALUES
(N'MDD',2,N'North ','2015-01-05','2017-12-31'),
(N'MDD',6,N'West','2018-01-01', NULL),
(N'STE ',6,N'West','2018-10-02', '2019-12-31'),
(N'STE',2,N'North ','2020-01-01', NULL),
(N'BBB',1,N'South','2019-01-01', NULL);
只需在ON
子句中包括这些条件:
SELECT s.Sale_Date, s.Sales_Amount, s.Sales_Person, spa.Region_Name
FROM sales s LEFT OUTER JOIN
SalesPersonAssignment spa
ON s.Sales_Person = spa.sales_person AND
s.Sale_Date >= spa.Region_Start_Date AND
(s.Sale_Date <= spa.Region_End_Date OR spa.Region_End_Date IS NULL);