sql - 如何在 T-SQL 中连接数字和字符串以格式化数字？

Question

我有以下功能

ALTER FUNCTION [dbo].[ActualWeightDIMS]
(
    -- Add the parameters for the function here
    @ActualWeight int,
    @Actual_Dims_Lenght int,
    @Actual_Dims_Width int,
    @Actual_Dims_Height int
)
RETURNS varchar(50)
AS
BEGIN

DECLARE @ActualWeightDIMS varchar(50);
--Actual Weight
     IF (@ActualWeight is not null) 
          SET @ActualWeightDIMS = @ActualWeight;
--Actual DIMS
     IF (@Actual_Dims_Lenght is not null) AND 
          (@Actual_Dims_Width is not null) AND (@Actual_Dims_Height is not null)
          SET @ActualWeightDIMS= @Actual_Dims_Lenght + 'x' + @Actual_Dims_Width + 'x' + @Actual_Dims_Height;


     RETURN(@ActualWeightDIMS);

END

但是当我尝试使用它时，出现以下错误“将 varchar 值“x”转换为数据类型 int 时转换失败。”当我使用以下选择语句时

select 
 BA_Adjustment_Detail.ID_Number [ID_Number],
 BA_Adjustment_Detail.Submit_Date [Submit_Date],
 BA_Category.Category [category],
 BA_Type_Of_Request.Request [Type_Of_Request],
 dbo.ActualWeightDIMS(BA_Adjustment_Detail.ActualWeight,BA_Adjustment_Detail.Actual_Dims_Lenght,BA_Adjustment_Detail.Actual_Dims_Width,BA_Adjustment_Detail.Actual_Dims_Height) [Actual Weight/DIMS],
 BA_Adjustment_Detail.Notes [Notes],
 BA_Adjustment_Detail.UPSCustomerNo [UPSNo],
 BA_Adjustment_Detail.TrackingNo [AirbillNo],
 BA_Adjustment_Detail.StoreNo [StoreNo],
 BA_Adjustment_Detail.Download_Date [Download_Date],
 BA_Adjustment_Detail.Shipment_Date[ShipmentDate],
 BA_Adjustment_Detail.FranchiseNo [FranchiseNo],
 BA_Adjustment_Detail.CustomerNo [CustomerNo],
 BA_Adjustment_Detail.BillTo [BillTo],
 BA_Adjustment_Detail.Adjustment_Amount_Requested [Adjustment_Amount_Requested]
from BA_Adjustment_Detail
inner join BA_Category 
on BA_Category.ID = BA_Adjustment_Detail.CategoryID
inner join BA_Type_Of_Request
on BA_Type_Of_Request.ID = BA_Adjustment_Detail.TypeOfRequestID

我想要做的是，如果 ActualWeight 不为空，则返回“实际重量/DIMS”的 ActualWeight，或者使用 Actual_Dims_Lenght、宽度和高度。

如果是 DIMS，那么我想将输出格式设置为 LenghtxWidhtxHeight (15x10x4)。 ActualWeight、Adcutal_Dims_Lenght、Width 和 Height 均为 int(整数)值，但“Actual Weight/DIMS”的输出应为 varchar(50)。

我哪里理解错了？

谢谢

编辑:用户只能在 ASP.net 页面上选择“重量”或“DIMS”，如果用户选择“DIMS”，则必须提供“长度”、“宽度”和“高度”。否则它将在 ASP.net 页面上抛出错误。我应该在sql方面担心它吗？

Answer 1

一些简短的说明:

• 是“长度”而不是“长度”
• 查询中的表别名可能会使其更具可读性

现在解决问题...

在尝试连接参数之前，您需要将参数显式转换为 VARCHAR。当 SQL Server 看到 @my_int + 'X' 时，它认为您正在尝试将数字“X”添加到 @my_int，但它无法执行此操作。相反，请尝试:

SET @ActualWeightDIMS =
     CAST(@Actual_Dims_Lenght AS VARCHAR(16)) + 'x' +
     CAST(@Actual_Dims_Width  AS VARCHAR(16)) + 'x' +
     CAST(@Actual_Dims_Height  AS VARCHAR(16))