Ambigous专栏名称？

Question

好的..我真的找不到问题,所以我在这里发帖.PS我是MSSQL的新手,所以请温柔的xD

我得到不明确的列名称"名称"

我有两张桌子:Cardiology和Cardio_Schedule.我想从两者中选择一些列并在gridview中显示它们.我已经提出了一个问题..这就是它:

string str = @"
SELECT Cardiology.CID,
       Cardiology.Name,
       Cardiology.Designation,
       Cardiology.Qualification,
       Cardiology.Shift,
       Cardiology.Appointment_Timings,
       Cardio_schedule.Ward_rounds,
       Cardio_schedule.Slot1,
       Cardio_schedule.Slot2,
       Cardio_schedule.Slot3,
       Cardio_schedule.Slot4,
       Cardio_schedule.BreakTime,
       Cardio_schedule.Slot5,
       Cardio_schedule.Slot6,
       Cardio_schedule.Slot7,
       Cardio_schedule.Slot8
FROM   Cardiology
       CROSS JOIN Cardio_schedule
WHERE  Cardiology.Name = Cardio_schedule.Name
       AND Name = '" + TextBox1.Text + "'";
            cmd = new SqlCommand(str, con);
            con.Open();
            SqlDataAdapter adp = new SqlDataAdapter(cmd);
            DataTable dt = new DataTable();
            adp.Fill(dt);
            GridView1.DataSource = dt;
            GridView1.DataBind();
            con.Close();

IDK问题是什么.我确实用ON尝试过,但后来在'ON'附近说错误的语法.任何形式的帮助将不胜感激.谢谢!

Answer 1

您的问题出在过滤器中: -

AND Name = '" + TextBox1.Text + "'";
            cmd = new SqlCommand(str, con);

根据您想要参考的表格进行更改: -

AND Cardiology.Name = '" + TextBox1.Text + "'";
            cmd = new SqlCommand(str, con);

请注意您的查询是针对SQL注入攻击打开的,所以您应该使用参数化查询,如下所示: -

string str = "Cardiology.CID,Cardiology.Name, .....WHERE  
              Cardiology.Name = Cardio_schedule.Name
              AND Cardiology.Name = @Name";
cmd = new SqlCommand(str, con);
cmd.Parameters.Add("@Name",DbType.NVarChar,20).Value = TextBox1.Text;
.....and so on

请注意,我已将您的数据类型视为NVarchar(20),您需要相应地更改它.