请协助我创建 SQL 脚本

Question

我正在尝试加入这两个 table 并从 table 1 中获取 ID #2 的总和并将其与 table 2

加入

TABLE # 1
customer  id amount
Nick      1    150
Jack      2    100
Jack      2    130
TABLE # 2
product   Typ   Date        id
Apple    Fruit  2/19/15     1
Banana   Fruit  2/19/15     2

我希望看到的结果是为 id # 2 提取了金额。

customer  id amount  product      Typ     Date      id
Nick      1    150    Apple      Fruit   2/19/15     1
Jack      2    230    Banana     Fruit   2/19/15     2

希望它有意义，

Answer 1

首先根据 customer.

找到 amount 的 Sum

然后使用 ID 将结果加入 table2 以获得结果。试试这个。

select * from table2 A
(
select sum(amount) amount,customer, id 
from table1
group by customer, id 
) B on A.Id =B.Id

Answer 2

我们可以使用 ROW_NUMBER() 和 PARTITION BY[=16] 而不是 Group by =].

DECLARE @TABLE1 TABLE(Customer varchar(100), Id int, Amount int) INSERT INTO @TABLE1 SELECT 'Nick', 1, 150 UNION SELECT 'Jack', 2, 100 UNION SELECT 'Jack', 2, 130 DECLARE @TABLE2 TABLE(Product varchar(100), Typ Varchar(20), [Date] date, Id int) INSERT INTO @TABLE2 SELECT 'Apple', 'Fruit', '2/19/15', 1 UNION SELECT 'Banana', 'Fruit', '2/19/15', 2 SELECT * FROM ( SELECT Customer, id, SUM(Amount) OVER (PARTITION BY Id) Amount, ROW_NUMBER() OVER (PARTITION BY Id ORDER BY Id) RN FROM @TABLE1 ) T1 JOIN @TABLE2 T2 ON T1.Id = T2.Id WHERE RN = 1

请协助我创建 SQL 脚本

Please assist me with creating SQL Script

sql

join

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sql-server-2008