Is using static appropriate for CRUD operation

public static class DBO
   {

       public static SqlConnection GetConnection()
       {
           SqlConnection con = new SqlConnection(WebConfigurationManager.ConnectionStrings["myconnection"].ConnectionString);
           if (con.State != ConnectionState.Open)
           {
               con.Open();
           }
           return con;
       }

       public static int IUD(string sql, SqlParameter[] param, CommandType cmdType)
       {
           using (SqlConnection con = GetConnection())
           {

               SqlCommand cmd = new SqlCommand(sql, con);
               cmd.CommandType = cmdType;

               if (param != null)
               {
                   cmd.Parameters.AddRange(param);
               }
               try
               {
                   return cmd.ExecuteNonQuery();
               }
               catch (Exception ex)
               {

                   throw ex;
               }

           }
       }
       public static DataTable GetTable(string sql, SqlParameter[] param, CommandType cmdType)
       {
           using (SqlConnection con = GetConnection())
           {
               using (SqlCommand cmd = new SqlCommand(sql, con))
               {
                   cmd.CommandType = cmdType;

                   if (param != null)
                   {
                       cmd.Parameters.AddRange(param);
                   }
                   SqlDataAdapter da = new SqlDataAdapter(cmd);

                   DataTable dt = new DataTable();
                   da.Fill(dt);

                   return dt;

               }
           }
       }