c# - 错误在我的 SQL 语句中显示 "Missing right parenthesis"...但它不是!帮助？

Question

这是我的 C# 程序中的语句:

(由 gbn 编辑，为清楚起见格式化所以不是全部在一行)

DbCommand.CommandText =
             @"SELECT 
      HIST.MBRSEP, HIST.LOCATION, HIST.BILLTYPE, HIST.BILLMOYR, LOCINFO.CYCLE, 
      LOCINFO.DIST, LOCINFO.LOCATION
    FROM 
      (CAV_MBRHISTDEL AS HIST INNER JOIN CAV_LOCINFODETL AS LOCINFO ON HIST.LOCATION = LOCINFO.LOCATION)
    WHERE
       LOCINFO.CYCLE = @CYCLE AND 
       LOCINFO.DIST = @DISTRICT AND 
       HIST.BILLTYPE = '09' AND 
       HIST.BILLMOYR <> '9999'";

这是错误信息:

ERROR [HY000] [Oracle][ODBC][Ora]ORA-00907: missing right parenthesis

我的 SQL 语句中只有 2 个括号，一个右括号，一个左括号。我不确定错误告诉我什么。有什么建议吗？

编辑:这是参数的定义方式:

        string cycle = cbCycle.Text;
        string district = cbDistrict.Text.Substring(0,2);

这是我将它们添加到 DbCommand 的地方:

        DbCommand.Parameters.AddWithValue("@CYCLE", cycle);
        DbCommand.Parameters.AddWithValue("@DISTRICT", district);

这是我的完整代码，当有人点击我表单上的“开始”按钮时触发:

private void btnGo_Click(object sender, EventArgs e)
    {
        //get parameters
        string cycle = cbCycle.Text;
        string district = cbDistrict.Text.Substring(0,2);

        //create a connection to the database
        OdbcConnection DbConnection = new OdbcConnection("DSN=UPN2;uid=xxx;pwd=xxxx");
        DbConnection.Open();

        //create a command to extract the required data and
        //assign it to the connection string
        OdbcCommand DbCommand = DbConnection.CreateCommand();
        DbCommand.CommandText =
             @"SELECT HIST.MBRSEP, HIST.LOCATION, HIST.BILLTYPE, HIST.BILLMOYR, LOCINFO.CYCLE, LOCINFO.DIST, LOCINFO.LOCATION FROM CAV_MBRHISTDEL AS HIST INNER JOIN CAV_LOCINFODETL AS LOCINFO ON HIST.LOCATION = LOCINFO.LOCATION WHERE LOCINFO.CYCLE = @CYCLE AND LOCINFO.DIST = @DISTRICT AND HIST.BILLTYPE = '09' AND HIST.BILLMOYR <> '9999'; ";

        DbCommand.Parameters.AddWithValue("@CYCLE", cycle);
        DbCommand.Parameters.AddWithValue("@DISTRICT", district);

        //Create a DataAdapter to run the command and fill the datatable
        OdbcDataAdapter da = new OdbcDataAdapter();
        da.SelectCommand = DbCommand;
        DataTable dt = new DataTable();
        da.Fill(dt);


        tbOutput.Text = PrintDataTable(dt);

        DbCommand.Dispose();
        DbConnection.Close();

    }

Answer 1

问题可能是您使用 oracle 保留字作为列名和参数名 - 即 CYCLE...这样做可能会导致数据库出现奇怪且不稳定的行为!

参见 http://download.oracle.com/docs/cd/B19306_01/em.102/b40103/app_oracle_reserved_words.htm

根据您的数据库提供商，您可能希望使用 : 而不是 @ 作为参数。