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Sql 如何绕过内部联接中的“循环引用”_Sql_Sql Server_Sql Server 2008 - Fatal编程技术网

Sql 如何绕过内部联接中的“循环引用”

Sql 如何绕过内部联接中的“循环引用”,sql,sql-server,sql-server-2008,Sql,Sql Server,Sql Server 2008,在我的内部连接中,我有以下“循环依赖”,你有什么想法可以绕过它吗 SELECT *FROM Reference INNER JOIN ReferenceInActivity ON Activity.ActivityID = ReferenceInActivity.ActivityID INNER JOIN @tbActivity AS Activity ON ReferenceInActivity.ReferenceID = Reference.ReferenceID 我得到一个错误:

在我的内部连接中,我有以下“循环依赖”,你有什么想法可以绕过它吗

SELECT *FROM Reference 
INNER JOIN ReferenceInActivity ON Activity.ActivityID = ReferenceInActivity.ActivityID 
INNER JOIN @tbActivity AS Activity ON ReferenceInActivity.ReferenceID = Reference.ReferenceID 
我得到一个错误: Msg 4104,16级,状态1,第387行
无法绑定多部分标识符Activity.ActivityID。

在from语句或join语句的查询中包含活动之前,您正在on语句中使用活动。像这样切换你的陈述:

SELECT     * 
FROM       Reference 
INNER JOIN ReferenceInActivity 
ON         ReferenceInActivity.ReferenceID = Reference.ReferenceID
INNER JOIN @tbActivity AS Activity 
ON         Activity.ActivityID = ReferenceInActivity.ActivityID 

在将活动包括在from语句或join语句的查询中之前,您正在on语句中使用该活动。像这样切换你的陈述:

SELECT     * 
FROM       Reference 
INNER JOIN ReferenceInActivity 
ON         ReferenceInActivity.ReferenceID = Reference.ReferenceID
INNER JOIN @tbActivity AS Activity 
ON         Activity.ActivityID = ReferenceInActivity.ActivityID