Question

我使用的是Microsoft SQL Server，在编写此代码时，我发现＆＃34; Inner＆＃34;而且＆＃34; =＆＃34;在SET行内。我已经调查了这一点并认为一切都设置正确，有人可以指出为什么可能吗？

USE [db1]

GO

UPDATE a.[table1] 
INNER JOIN a.[table1] = a.[table2]
ON a.[table1].[field1] = a.[table2].[field1]
SET [field2] = a.[table2].[field2]
WHERE [ID] IN (SELECT #TempTable.[ID] FROM #TempTable)

Answer 1

好吧，我完全不知道你从UPDATE获得JOIN的语法在哪里，但它很混乱。这应该是正确的代码：

UPDATE t1
SET t1.field2 = t2.field2
FROM dbo.table1 t1
INNER JOIN dbo.table2 t2
    ON t1.field1 = t2.field2
WHERE [ID] IN (SELECT [ID] FROM #TempTable);

Answer 2

UPDATE  a
SET [field2] = a.[table2].[field2]
from  a.[table1] 
INNER JOIN a.[table1] = a.[table2]
ON a.[table1].[field1] = a.[table2].[field1]
WHERE [ID] IN (SELECT #TempTable.[ID] FROM #TempTable)

看看它是否正常工作

Answer 3

尝试以下

UPDATE a.[table1] 
SET [field2] = a.[table2].[field2]
From a.[table1]
INNER JOIN a.[table2]
ON a.[table1].[field1] = a.[table2].[field1]
WHERE [ID] IN (SELECT #TempTable.[ID] FROM #TempTable)

Answer 4

使用内部联接更新

UPDATE T1
    SET T1.[field2] = T2.[field2]
    FROM a.[table1] AS T1 
    INNER JOIN a.[table2] AS T2
    ON T1.[field1] = T2.[field1]

Update-Inner Join语句的语法错误不正确

4 个答案: