分部查询

Question

这是来自我的数据库的示例信息，因此可以显示我需要完成的全部图片

Create Table #Information
(
    salesID int,
    storelocation varchar(100),
    salespersonName varchar(100)
)

Insert Into #Information Values
(1, 'New York', 'Michael'),
(2, 'New York', 'Michael'),
(3, 'New York', 'Michael'),
(4, 'New York', 'Michael'),
(5, 'Texas', 'Richard'),
(6, 'Texas', 'Richard'),
(7, 'Texas', 'Richard'),
(8, 'Texas', 'Richard'),
(9, 'Texas', 'Richard'),
(10, 'Texas', 'Richard'),
(11, 'Washington', 'Sam'),
(12, 'Washington', 'Sam'),
(13, 'Washington', 'Sam'),
(14, 'Washington', 'Sam'),
(15, 'Washington', 'Sam')


SELECT storelocation,
COUNT(salesID/storelocation)
FROM #Information

我想获得salesID的总计数，然后除以该storelocation的salesID。所以我希望发生的分工是

New York - 15/4 = .266
Texas - 15/6 = .4
Washington - 15/5 = .333

我这样做的方式就是这样 - 但这并没有返回准确的结果。

declare @TotalCount as int
select @TotalCount = convert(decimal(18,4), count(salesID))
from #information
Select
convert(decimal(18,4), Count(salesID))/@TotalCount
From #information

Answer 1

将总计数查询设为Subquery并将其除以storelocation组计数

SELECT storelocation,
       (SELECT CONVERT(DECIMAL(18, 4), Count(1))
        FROM   #Information) / Count(1)
FROM   #Information
GROUP  BY storelocation 

Answer 2

试试这个：

DECLARE @TotalCount as int;

SELECT @TotalCount = COUNT(salesID) 
FROM #information;

SELECT storeLocation, (@TotalCount / COUNT(salesID)) AS division
FROM #information
GROUP BY storeLocation;

Answer 3

CREATE TABLE #Information
(
    salesID             INT,
    storelocation       VARCHAR(100),
    salespersonName     VARCHAR(100)
)

INSERT INTO #Information
VALUES
(1, 'New York', 'Michael'),
(2, 'New York', 'Michael'),
(3, 'New York', 'Michael'),
(4, 'New York', 'Michael'),
(5, 'Texas', 'Richard'),
(6, 'Texas', 'Richard'),
(7, 'Texas', 'Richard'),
(8, 'Texas', 'Richard'),
(9, 'Texas', 'Richard'),
(10, 'Texas', 'Richard'),
(11, 'Washington', 'Sam'),
(12, 'Washington', 'Sam'),
(13, 'Washington', 'Sam'),
(14, 'Washington', 'Sam'),
(15, 'Washington', 'Sam')


DECLARE @TotalCount AS INT
SELECT @TotalCount = CONVERT(DECIMAL(18, 4), COUNT(salesID))
FROM   #information

SELECT storelocation,
       @TotalCount / CONVERT(DECIMAL(18, 4), COUNT(storelocation)) AS Division
FROM   #Information
GROUP BY
       storelocation