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Sql 两列上的左侧外部连接仅连接一列_Sql_Sql Server_Tsql - Fatal编程技术网

Sql 两列上的左侧外部连接仅连接一列

Sql 两列上的左侧外部连接仅连接一列,sql,sql-server,tsql,Sql,Sql Server,Tsql,我希望这段代码不仅在clientlocation上连接,而且在clientdivision上连接,这样它只在clientlocation是A,clientdivision是B时匹配。我做错了什么 left outer join EMEA_TRANS.dbo.CT_AutomationEmail_TEST B on (B.[CLIENTLOCATION] = A.[CT Client Location] and B.[ClientDivision] = A.[CLI

我希望这段代码不仅在clientlocation上连接,而且在clientdivision上连接,这样它只在clientlocation是A,clientdivision是B时匹配。我做错了什么

  left outer join EMEA_TRANS.dbo.CT_AutomationEmail_TEST B
      on  (B.[CLIENTLOCATION] = A.[CT Client Location]
      and  B.[ClientDivision] = A.[CLIENTDIVISION])

若并没有找到匹配项,那个么
LEFT JOIN
仍然返回一行,其中左表中的列包含值,右表中的列都为空


内部联接将不会生成该行。

它必须与数据相关。我不认为这两个条件都可以显示输出。然而,提供一个样本数据将使它更容易

向我们展示一些示例表数据和所需结果。(作为格式化的文本,而不是图像。)再看一看。左外连接与左连接相同,尝试去掉“外连接”