what is inner join and outer join., differnce between both

Question

what is inner join and outer join., differnce between both

Answer 1

Hi Sumaira,


Try this...


using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
    string strConnString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
    string str;
    SqlCommand com;
    protected void Page_Load(object sender, EventArgs e)
    {
       
        SqlConnection con = new SqlConnection(strConnString);

        if (!IsPostBack)
        {
            DropDownList1.Items.Add("Choose");
            con.Open();
            str = "select * from clinic patient registration";
            com = new SqlCommand(str, con);
            SqlDataReader reader = com.ExecuteReader();
            while (reader.Read())
            {
                DropDownList1.Items.Add(reader["patient reg code"].ToString());
            }
            reader.Close();
            con.Close();
        }
    }
  
}



Thanks

Answer 2

thanks sir