“INSERT INTO语句中的语法错误”。为什么？

My code is below. I have a method where I pass in three parameters and they get written out to an MS Access database table. However, I keep getting a syntax error message. Can anyone tell me why? I got this example from the internet.

我的代码如下。我有一个方法，我传入三个参数，然后写入MS Access数据库表。但是，我不断收到语法错误消息。谁能告诉我为什么？我从互联网上得到了这个例子。

        private static void insertRecord(string day, int hour, int loadKW)
    {
        string connString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\LoadForecastDB.accdb";
        OleDbConnection conn = new OleDbConnection(connString);

        string ins = @"INSERT INTO Forecasts (Day, Hour, Load) VALUES (?,?,?)";

        OleDbCommand cmd = new OleDbCommand(ins, conn);

        cmd.Parameters.Add("@day", OleDbType.VarChar).Value = day;
        cmd.Parameters.Add("@hour", OleDbType.Integer).Value = hour;
        cmd.Parameters.Add("@load", OleDbType.Integer).Value = loadKW;

        conn.Open();

        try
        {
            int count = cmd.ExecuteNonQuery();
        }
        catch (OleDbException ex)
        {
            Console.WriteLine(ex.Message);
        }
        finally
        {
            conn.Close();
        }
    }

3 个解决方案

#1

I think this could be because your column names (Day and Hour) are also keywords. Maybe you can put ` (inverted single quotes) around them (that works in MySQL, don't know about MS Access)

我想这可能是因为您的列名（日和小时）也是关键字。也许你可以把'（倒置的单引号）放在它们周围（在MySQL中有效，不了解MS Access）

#2

Try changing

尝试改变

string ins = @"INSERT INTO Forecasts (Day, Hour, Load) VALUES (?,?,?)";

To:

至：

string ins = @"INSERT INTO Forecasts ([Day], [Hour], [Load]) VALUES (@day, @hour, @load)";

#3

Another option might be to refer bind variables with numbers:

另一种选择可能是使用数字引用绑定变量：

    cmd.Parameters.Add(1, OleDbType.VarChar).Value = day;
    cmd.Parameters.Add(2, OleDbType.Integer).Value = hour;
    cmd.Parameters.Add(3, OleDbType.Integer).Value = loadKW;

Note I do not know C#, but similar approach works for Java and JDBC.

注意我不知道C＃，但类似的方法适用于Java和JDBC。

#1