查询大数据表的效率对比：Linq to SQL、Entity Framework、企业(7)

            db.AddInParameter(dbCommand, "ID", DbType.String, i);
            db.AddInParameter(dbCommand, "Name", DbType.String, model.Name);
            db.AddInParameter(dbCommand, "Country", DbType.String, model.Country);
            db.AddInParameter(dbCommand, "Province", DbType.String, model.Province);
            db.AddInParameter(dbCommand, "City", DbType.String, model.City);
            db.AddInParameter(dbCommand, "Address", DbType.String, model.Address);
            db.AddInParameter(dbCommand, "ZipCode", DbType.String, model.ZipCode);
            db.AddInParameter(dbCommand, "Phone", DbType.String, model.Phone);
            db.AddInParameter(dbCommand, "IsApproved", DbType.Boolean, model.IsApproved);
            return db.ExecuteNonQuery(dbCommand);
        }

        Database db;
        DbCommand dbCommand;
        public DataSet select()
        {
            try
            {
                db = DatabaseFactory.CreateDatabase();
                dbCommand = db.GetStoredProcCommand("SelectSchoolsAll");
                return db.ExecuteDataSet(dbCommand);
            }
            finally
            {
                dbCommand.Connection.Close();
                dbCommand.Connection.Dispose();
            }
        }

        public DataSet select1()
        {