转换失败的 varchar 值答案

【问题标题】：Conversion Failed varchar Value转换失败的 varchar 值
【发布时间】：2018-12-24 21:21:21
【问题描述】：

   SELECT  
    ClientID,
    ProfileID as [Profile ID],
    Title,Name as [First Name],
    Surname as [Last Name],
    Lender,
    Product,
    LoanAmount as [Loan Amount],
    DateCompleted as [Mortgage Completed Date],
    Source as [Lead Source],
    ERC as [Erc Date],
    Casetype as [Case Type],
    email,
    HouseNameNum as Street,
    Address1 as Street, 
    Address2 as Street,
    Town as City,
    (postcode1 + postcode2) as Postcode,
    CAST('http://172.16.200.119/BPSAdmin/Legacy/CommTracking.aspx?ClientId='+ ClientID AS VARCHAR(100)) as [Perspectives Comms]
FROM Datatable

我收到的错误是：

转换 varchar 值时转换失败

'http://172.16.200.119/BPSAdmin/Legacy/CommTracking.aspx?ClientId='转数据类型int

ClientID 是一个 INT，但是，我想在字段的开头添加一些字符串以创建指向客户文件的超链接。

关于如何解决此问题的任何建议干杯

【问题讨论】：

标签： sql casting type-conversion varchar

【解决方案1】：

我认为您需要自行显式转换客户 ID 列，因此只需将转换转换：'http://172.16.200.119/BPSAdmin/Legacy/CommTracking.aspx?ClientId=' + cast(clientid as varchar)

【讨论】：

【解决方案2】：

在演员表之外添加 url，使其转换函数工作并将Int 转换为varchar

由于 Int 和 string 不能连接，所以需要相同的数据类型。

SELECT  
    ClientID,
    ProfileID as [Profile ID],
    Title,Name as [First Name],
    Surname as [Last Name],
    Lender,
    Product,
    LoanAmount as [Loan Amount],
    DateCompleted as [Mortgage Completed Date],
    Source as [Lead Source],
    ERC as [Erc Date],
    Casetype as [Case Type],
    email,
    HouseNameNum as Street,
    Address1 as Street, 
    Address2 as Street,
    Town as City,
    (postcode1 + postcode2) as Postcode,
    'http://172.16.200.119/BPSAdmin/Legacy/CommTracking.aspx?ClientId='+ CAST( ClientID AS VARCHAR(100)) as [Perspectives Comms]
FROM Datatable

【讨论】：