检索最后插入的记录

Question

I want to retrieve the last record of data inserted. I researched and learn't I must use SELECT LAST_INSERT_ID(). I have tried and not working. So I have provided my code below

  //Inserting into Student Table
            string query = "INSERT INTO student(name) Values('" + txtboxname.Text + "' )";
          // query= "SELECT LAST_INSERT_ID()";
            // query += " SELECT SCOPE_IDENTITY()";
            //Inserting into course table
            string query1 = "INSERT INTO course(title) Values('" + txttitle.Text + "')";
          //  query1 = " SELECT LAST_INSERT_ID()";

            //Execute Insert Statement queries
            MySqlCommand command = new MySqlCommand(query, con);
            command.ExecuteNonQuery();
            command = new MySqlCommand(query1, con);
            command.ExecuteNonQuery();

            //Close and dispose off connections
            command.Dispose();
            con.Close();

//Preview page

        string query1 = "SELECT (name) FROM student WHERE ID = id"; 
        string query2 = "SELECT (title) FROM course WHERE ID = id";

        MySqlCommand command = new MySqlCommand(query1, con);
        lblname.Text = command.ExecuteScalar().ToString();

        command = new MySqlCommand(query2, con);
        lbltitle.Text = command.ExecuteScalar().ToString();

        con.Close();

Answer 1

如果您已将表ID设置为自动递增，则根据我的知识，如果可以，则从表中查找将是您最后插入的最大ID。

Answer 2

In your Code change as follows,

line no: 3 query="set @std_id=last_insert_id();"

line no: 7 query1="set @title_id=last_insert_id();"

Preview Page:

    string query1 = "SELECT (name) FROM student WHERE ID = query"; 
    string query2 = "SELECT (title) FROM course WHERE ID = query1";