Question

我有一个相对独特的问题，虽然我已经找了2天但我找不到正确的答案。

在我当前的项目中，我使用活动报告6从存储在SQL服务器上的数据创建报告。

我试图使用一个没有运气的select distinct语句。

我使用SQL创建视图，但是我没有将其保存为视图，每次请求报表时，代码本身都将作为查询运行。

报告将显示公司租赁的所有现有车辆。因此，报告必须仅在注册字段中带回独特的点击。因为它可以在那里多次，如果超过1人驾驶该车辆等。

这是我的sql代码

select distinct on Registration from CompanyCars

CompanyCars.Registration as Regno,
[Staff Details].[first Name] + ' ' + [Staff Details].[Last Name] as Driver,
CompanyCars.Car_Type as VehicleType,    
CompanyCars.Reg_Date as Regdate,
CompanyCars.Price as Price,


[Staff Details].[NI Number] as NInumber,

CompanyCars.End_Mile - CompanyCars.Start_Mile as UsedMiles,
CompanyCars.Lease_Mile -(CompanyCars.End_Mile - CompanyCars.Start_Mile) as ExcessMiles,
case when CompanyCars.Lease_Mile -(CompanyCars.End_Mile - CompanyCars.Start_Mile) < 0 and CompanyCars.Excess <> 0 then (CompanyCars.End_Mile - CompanyCars.Start_Mile)- CompanyCars.Lease_Mile * (CompanyCars.Excess / 100) else 0 end as overunder,
CompanyCars.Excess as ExcessRate,
CompanyCars.Company as Company



FROM [Staff Details] INNER JOIN [CompanyCarHistory] ON [Staff Details].Staffref = [CompanyCarHistory].StaffRef
 INNER JOIN CompanyCars ON CompanyCars.Registration = [CompanyCarHistory].Registration

任何想法？我的SQL不是很好。

保

Answer 1

我只是将你的代码放入subselect（未经测试）：

SELECT *
FROM
(
    select 
    ROW_NUMBER() OVER (PARTITION BY CompanyCars.Registration ORDER BY CompanyCars.Reg_Date DESC) AS rowid
    CompanyCars.Registration as Regno,
    [Staff Details].[first Name] + ' ' + [Staff Details].[Last Name] as Driver,
    CompanyCars.Car_Type as VehicleType,    
    CompanyCars.Reg_Date as Regdate,
    CompanyCars.Price as Price,


    [Staff Details].[NI Number] as NInumber,

    CompanyCars.End_Mile - CompanyCars.Start_Mile as UsedMiles,
    CompanyCars.Lease_Mile -(CompanyCars.End_Mile - CompanyCars.Start_Mile) as ExcessMiles,
    case when CompanyCars.Lease_Mile -(CompanyCars.End_Mile - CompanyCars.Start_Mile) < 0 and CompanyCars.Excess <> 0 then (CompanyCars.End_Mile - CompanyCars.Start_Mile)- CompanyCars.Lease_Mile * (CompanyCars.Excess / 100) else 0 end as overunder,
    CompanyCars.Excess as ExcessRate,
    CompanyCars.Company as Company




    FROM [Staff Details] INNER JOIN [CompanyCarHistory] ON [Staff Details].Staffref = [CompanyCarHistory].StaffRef
     INNER JOIN CompanyCars ON CompanyCars.Registration = [CompanyCarHistory].Registration
) as Temp
where rowid = 1

选择distinct语句不起作用，Active报告和SQL

1 个答案: