附近有语法错误“（”

Question

有谁能够告诉我，为什么下面的代码产生错误：

cQueryIS = "UPDATE Additional (StaffEUPN, Class, Additional1, Additional2, Additional3, Additional4,AdditionalLarge1, AdditionalLarge2, AdditionalLarge3, AdditionalLarge4) " 

cQueryIS &= "VALUES (@cSTEupn, @cClass, @cAdditional1, @cAdditional2, @cAdditional3, @cAdditional4, @cAdditionalLarge1, @cAdditionalLarge2, @cAdditionalLarge3, @cAdditionalLarge4) " 

cQueryIS &= "WHERE StaffEUPN = '" & cStaffEUPN & "' AND Class = '" & cClass & "'" 

然而此代码的工作：

cQueryIS = "UPDATE Additional SET StaffEUPN=@cSTEupn, Class=@cClass, 
Additional1=@cAdditional1, Additional2=@cAdditional2, Additional3=@cAdditional3, 
Additional4=@cAdditional4, AdditionalLarge1=@cAdditionalLarge1, 
AdditionalLarge2=@cAdditionalLarge2, AdditionalLarge3=@cAdditionalLarge3, 
AdditionalLarge4=@cAdditionalLarge4 " 

cQueryIS &= "WHERE StaffEUPN = '" & cStaffEUPN & "' AND Class = '" 
& cClass & "'" 

我有点困惑，因为我做的方式它首先在INSERT命令上正常工作，仅在UPDATE上导致错误。

以下是其余代码：

 Using dbConnectionSQL As New SqlConnection(dbConnectionString) 
      Using comm As New SqlCommand() 
       With comm 
        .Connection = dbConnectionSQL 
        .CommandType = CommandType.Text 
        .CommandText = cQueryIS 
        .Parameters.AddWithValue("@cSTEupn", cStaffEUPN) 
        .Parameters.AddWithValue("@cClass", cClass) 
        .Parameters.AddWithValue("@cAdditional1", ProvisionAdditional(1)) 
        .Parameters.AddWithValue("@cAdditional2", ProvisionAdditional(2)) 
        .Parameters.AddWithValue("@cAdditional3", ProvisionAdditional(3)) 
        .Parameters.AddWithValue("@cAdditional4", ProvisionAdditional(4)) 
        .Parameters.AddWithValue("@cAdditionalLarge1", ProvisionAdditional(5)) 
        .Parameters.AddWithValue("@cAdditionalLarge2", ProvisionAdditional(6)) 
        .Parameters.AddWithValue("@cAdditionalLarge3", ProvisionAdditional(7)) 
        .Parameters.AddWithValue("@cAdditionalLarge4", ProvisionAdditional(8)) 
       End With 
       Try 
        dbConnectionSQL.Open() 
        comm.ExecuteNonQuery() 
       Catch ex As SqlException 
        WriteToLogFile("Update Additional", ex.Message.ToString()) 
        MsgBox("Update Additional - " & ex.Message.ToString()) 
        Exit Sub 
       End Try 
      End Using 
     End Using 

Answer 1

因为在第一个示例中，您在UPDATE命令中使用INSERT语法。在第二个示例中，您正在使用正确的UPDATE语法。

INSERT和UPDATE的语法不同。你应该阅读文档，但一般：

INSERT INTO <Table> (Field1, ..., FieldN) VALUES (Value1, ..., ValueN) 
vs. 
UPDATE <Table> SET Field1 = Value1, ..., FieldN = ValueN WHERE <Condition> 

有更多的方式可以使用它，但基本上就是这样。