SQL Server 2012 添加具有匹配 id 的行的值

Question

我正在 SQL Server 2012 上做作业，我必须这样做

7) 创建一个存储过程（称为SQL7），它将检索 慈善机构 ID 和慈善机构名称以及所有捐款总额 每个慈善机构在捐款表中的金额。”

Charity ID 和 Charity Name 在一个表中，第二个表有 CharityID 和 Total 贡献。

我不知道如何将每个慈善机构收到的总捐款相加并输出。我到目前为止的代码是

create proc SQL7
as
   select distinct 
       dbo.CharityTbl.CharityID, CharityName,
   from 
       dbo.CharityTbl, dbo.ContributionsTbl
   where 
      dbo.CharityTbl.CharityID = dbo.ContributionsTbl.CharityID

提前致谢！

Answer 1

您可能需要分组（假设 table1 保存慈善信息，table2 保存捐款信息）

create procedure SQL7
as
  select a.charityid, a.charityname, sum(b.totalcontributions) as totals
  from CharityTbl a
  left join ContributionsTbl b on a.charityid = b.charityid
  group by a.charityid, a.charityname

SQLFiddle 示例：http://sqlfiddle.com/#!3/67cca 和 http://sqlfiddle.com/#!3/ca00e

create table charityTbl (charityid int, charityname varchar(100));
insert into charityTbl values (1, 'Red Cross'), (2, 'Doctors without borders');

create table contributionsTbl (charityid int, totalcontributions int);
insert into contributionsTbl values
(1, 100),
(1, 200),
(2, 500);

（只要认为这是一个存储过程，并使用exec SQL7 调用）

 select a.charityid, a.charityname, sum(b.totalcontributions) as totals
  from CharityTbl a
  left join ContributionsTbl b on a.charityid = b.charityid
  group by a.charityid, a.charityname

结果：

| charityid |             charityname | totals |
|-----------|-------------------------|--------|
|         2 | Doctors without borders |    500 |
|         1 |               Red Cross |    300 |

Answer 2

create proc SQL7
as
SELECT CharityTbl.CharityID,
    MIN(CharityName) AS CharityName,
    SUM(contribution_amount) AS TotalContribution
FROM CharityTbl
    JOIN ContributionsTbl ON CharityTbl.CharityID = ContributionsTbl.CharityID
GROUP BY CharityTbl.CharityID

contribution_amount 是您的捐款金额字段的名称。

Answer 3

你需要了解Join

CREATE PROC SQL7
AS
SELECT
    charity.CharityID
    ,charity.CharityName
    SUM(contrib.TotalContrib)
FROM 
    dbo.CharityTbl                  AS charity
    INNER JOIN dbo.ContributionsTbl AS contrib 
    ON contrib.CharityID = charity.CharityID
GROUP BY
    charity.CharityID
    ,charity.CharityName

Answer 4

Create Proc SQL7
As
Begin

Select CharityID, min(CharityName), Sum(Contributions) as TotalContributions
From
dbo.CharityTbl As Ch
Inner Join
dbo.Contributionstbl as Co
on ch.CharityID = Co.CharityID
group by CharityID
End