Question

编辑：

我有两个表，表1和表2通过GUID链接，我想在表2中搜索表1中没有的任何GUID并插入它们

我正在尝试使用insert from where where语句，如下所示：

insert into WebCatalog.Published.DemoTracking (RCompanyLink, Purchased, DemoDate)
Select RC.Link, Purchased = 0, DemoDate = GETDATE()
from WebCatalog.Published.RCompany RC
where RC.Link != WebCatalog.Published.DemoTracking.RCompanyLink and RC.DemoLicense = 1

当它在存储过程中时，我不断收到无效对象名称错误，并且多部分标识符无法在引用

时绑定

WebCatalog.Published.DemoTracking.RCompanyLink

当我尝试自己执行它时出现

错误。

我是否错误地格式化了我的陈述？

Answer 1

而不是

 RC.Link != WebCatalog.Published.DemoTracking.RCompanyLink

使用

 RC.Link not in ( Select RCompanyLink from WebCatalog.Published.DemoTracking )

完整代码

INSERT INTO webcatalog.published.demotracking 
            (rcompanylink, 
             purchased, 
             demodate) 
SELECT RC.link, 
       Purchased = 0, 
       DemoDate = Getdate() 
FROM   webcatalog.published.rcompany RC 
WHERE  RC.link NOT IN (SELECT rcompanylink 
                       FROM   webcatalog.published.demotracking) 
       AND RC.demolicense = 1

Answer 2

问题是在SQL中你必须告诉服务器数据的相关性;它不会自动推断它。你看起来它可能在一个orm中工作并使用Linq2Sql（.Net技术）。

我建议使用NOT EXISTS，我相信它比IN更好。

INSERT INTO webcatalog.published.demotracking 
            (rcompanylink, 
             purchased, 
             demodate) 
SELECT RC.link, 
       Purchased = 0, 
       DemoDate = Getdate() 
FROM   webcatalog.published.rcompany RC 
WHERE  NOT EXISTS (SELECT *
         FROM   webcatalog.published.demotracking dt WHERE dt.rcompanylink = RC.link) 
       AND RC.demolicense = 1

使用insert into时，存储过程中的对象名无效

2 个答案: