VB.Net合并/更新查询不工作

Question

我有两个SQL数据库表klaar和klaarvb，我想用下面的代码合并：

 Dim READER As SqlDataReader 

    Try 
     konneksie.Open() 
     Dim query As String 

     query = "MERGE blokkeklaar as target" & _ 
       "USING blokkeklaarVB AS source" & _ 
       "On target.Plaasblok = source.Plaasblok" & _ 
       "WHEN MATCHED THEN" & _ 
       "UPDATE SET klaarvb = source.klaarvb;" 

     COMMAND = New SqlCommand(query, konneksie) 
     READER = COMMAND.ExecuteReader 
     MessageBox.Show("Inligting vanaf blokkeklaarVB na blokkeklaar") 

     konneksie.Close() 



    Catch ex As Exception 
     MessageBox.Show(ex.Message) 
    Finally 
    End Try 

我得到一个错误“blokkeklaarVB附近有语法错误”

当我运行在SQL管理语句我得到正确的结果：

MERGE blokkeklaar as target 
       USING blokkeklaarVB AS source 
       On target.Plaasblok = source.Plaasblok 
       WHEN MATCHED THEN 
       UPDATE SET klaarvb = source.klaarvb; 

我想不通，我错过了什么。

Regards

Answer 1

在连接不同的行时，您在行续行之前缺少单词之间的空格。

query = "MERGE blokkeklaar as target " & _ 
      "USING blokkeklaarVB AS source " & _ 
      "On target.Plaasblok = source.Plaasblok " & _ 
      "WHEN MATCHED THEN " & _ 
      "UPDATE SET klaarvb = source.klaarvb;"