不正确的语法必须声明标量变量

Question

我正在尝试将数据从 MS Access 复制到 SQL Server 数据库。

其中一列的名称为 Fill Pressure (psi)，这会导致 SQL Server 出现问题。我收到以下错误：

““Psi”附近的错误语法必须声明标量变量@fill。

代码如下

 Dim Cmd As New SqlClient.SqlCommand
 Cmd.Connection = sqlConnection

 For Each dc As DataColumn In AccessTable.Columns
     colquery = colquery + "[" + dc.ColumnName + "],"
     valquery = valquery + "@" + dc.ColumnName + ","
     Cmd.Parameters.AddWithValue("@" + dc.ColumnName, dr(dc.ColumnName))
 Next

 colquery = colquery.Substring(1, colquery.Length - 1)
 valquery = valquery.Substring(1, valquery.Length - 1)

 colquery = colquery + ")"
 valquery = valquery + ")"
 Sqlquery = colquery + valquery
 Sqlquery = Replace(Sqlquery, ",)", ")")

 Cmd.Connection = sqlConnection
 Cmd.CommandType = CommandType.Text
 Cmd.CommandText = Sqlquery

 Dim sqlcommand1 As SqlClient.SqlCommand = New SqlClient.SqlCommand("SET IDENTITY_INSERT  [" + TableName + "]  ON", sqlConnection)
 sqlcommand1.ExecuteNonQuery()
 Cmd.ExecuteNonQuery()

 Dim sqlcommand2 As SqlClient.SqlCommand = New SqlClient.SqlCommand("SET IDENTITY_INSERT [" + TableName + "] OFF", sqlConnection)
 sqlcommand2.ExecuteNonQuery()

watch 中的插入语句示例。我已经尝试用空字符串替换空格和“（”和“）”，但它不起作用。

"INSERT INTO [dbo].[tblVesselTypes] ([VesselType_ID], [Manufacturer],[Model], [Fill Pressure (psi)], [Empty Weight (lbs)], [Full Weight (lbs)], [Liq Liters], [Type], [Size])
VALUES (@VesselType_ID, @Manufacturer, @Model, @Fill Pressure (psi), @Empty Weight (lbs), @Full Weight (lbs), @Liq Liters, @Type, @Size)"

Answer 1

在 MS Sql 中不可能有像 @Fill Pressure (psi) 这样名称的变量。如果@Fill 是一个变量名，而Pressure (psi) 是未知的命令或类型（用于变量声明）或其他东西，SQL Server 会解析 - 无论如何这里都会出错。

查看 MS SQL 中不同类型对象的命名约定：
https://msdn.microsoft.com/en-us/library/ms175874.aspx

变量名中不能有空格或括号。而对象名称可以用方括号或引号括起来。

您可能的变量名称是，例如：@FillPressure_psi

所以整个插入语句看起来像：

"INSERT INTO [dbo].[tblVesselTypes] ([VesselType_ID], [Manufacturer],[Model], [Fill Pressure (psi)], [Empty Weight (lbs)], [Full Weight (lbs)], [Liq Liters], [Type], [Size])
VALUES (@VesselType_ID, @Manufacturer, @Model, @FillPressure_psi, @EmptyWeight_lbs, @FullWeight_lbs, @Liq Liters, @Type, @Size)"