Question

我正在尝试编写以下SQL Server查询，其中我还需要获取子表中引用的vehicleId计数，

select 
    BV.[BaseVehicleId], BV.[MakeId], MK.[MakeName], BV.[ModelId], 
    MD.[ModelName], V.[VehicleId], V.[SubModelId], SubMD.[SubModelName], 
    V.[RegionId], V.PublicationStageId,
    V.[LastUpdateDate], V.[InsertDate], V2BedCount, V2BodyCount, 
    V2BrakeCount, V2DriveCount, V2EngineCount,V2MfrCount, V2SpringCount, 
    V2SteeringCount, V2TransmissionCount, V2WheelCount
from  
    [dbo].[BaseVehicle] BV,
    [dbo].[Make] MK,
    [dbo].[Model] MD,
    [dbo].[SubModel] SubMD,
    [dbo].[VehicleToBedConfig] V2Bed,
    [dbo].[VehicleToBodyStyleConfig] V2Body,
    [dbo].[VehicleToBrakeConfig] V2Brake,
    [dbo].[VehicleToDriveType] V2Drive,
    [dbo].[VehicleToEngineConfig] V2Engine,
    [dbo].[VehicleToMfrBodyCode] V2Mfr,
    [dbo].[VehicleToSpringTypeConfig] V2Spring,
    [dbo].[VehicleToSteeringConfig] V2Steering,
    [dbo].[VehicleToTransmission] V2Transmission,
    [dbo].[VehicleToWheelBase] V2Wheel,
    [dbo].[Vehicle] V
where
    V.[PublicationStageId] = '4' 
    and V.[DeleteDate] IS NULL 
    and BV.[BaseVehicleId] = V.[BaseVehicleId] 
    and MK.[MakeId] = BV.[MakeId] 
    and MD.[ModelId] = BV.[ModelId] 
    and V.[SubModelId] = SubMD.[SubModelId] 
    and V.[VehicleId] = V2Bed.[VehicleId] 
    and V.[VehicleId] = V2Body.[VehicleId] 
    and V.[VehicleId] = V2Brake.[VehicleId] 
    and V.[VehicleId] = V2Drive.[VehicleId] 
    and V.[VehicleId] = V2Engine.[VehicleId] 
    and V.[VehicleId] = V2Mfr.[VehicleId] 
    and V.[VehicleId] = V2Spring.[VehicleId] 
    and V.[VehicleId] = V2Steering.[VehicleId] 
    and V.[VehicleId] = V2Transmission.[VehicleId] 
    and V.[VehicleId] = V2Wheel.[VehicleId]

我正在寻找一种方法来推送上述查询中这些列的详细信息：

V2BedCount, V2BodyCount, V2BrakeCount, 
V2DriveCount, V2EngineCount,
V2MfrCount, V2SpringCount, V2SteeringCount, V2TransmissionCount, 
V2WheelCount

此处V2BedCount是使用VehicleToBedConfig表映射的车辆ID的计数，如

select COUNT(VehicleId) V2BedCount 
from VehicleToBedConfig 
group by VehicleId

请让我知道如何在第一个查询中插入第二个查询，让一个查询填充所有这些列的计数详细信息

V2BedCount, V2BodyCount, V2BrakeCount, 
V2DriveCount, V2EngineCount,
V2MfrCount, V2SpringCount, V2SteeringCount, V2TransmissionCount, 
V2WheelCount

Answer 1

假设Id是VehicleToBedConfig尝试

中的PK

COUNT(DISTINCT V2Bed.Id) OVER(PARTITION BY V.VehicleId) V2BedCount,
...

我建议您使用明确的JOIN语法。

SQL查询以获取关联表上的计数

1 个答案: