查询大数据表的效率对比：Linq to SQL、Entity Framework、企业(8)

        public DataSet select2()
        {
            Database db = DatabaseFactory.CreateDatabase();
            DbCommand dbCommand = db.GetStoredProcCommand("SelectSystemErrorLogsAll");
            return db.ExecuteDataSet(dbCommand);
        }

        public DataSet selectSQL()
        {
            Database db = DatabaseFactory.CreateDatabase();
            DbCommand dbCommand = db.GetSqlStringCommand("select * from School");
            return db.ExecuteDataSet(dbCommand);
        }

        public IDataReader selectSQLReader()
        {
            Database db = DatabaseFactory.CreateDatabase();
            DbCommand dbCommand = db.GetSqlStringCommand("select * from School");
            return db.ExecuteReader(dbCommand);
        }

        public DataSet selectView()
        {
            Database db = DatabaseFactory.CreateDatabase();
            DbCommand dbCommand = db.GetSqlStringCommand("select * from ViewsSchool");
            return db.ExecuteDataSet(dbCommand);
        }

        public DataSet selectProSet()
        {
            Database db = DatabaseFactory.CreateDatabase();
            DbCommand dbCommand = db.GetStoredProcCommand("SelectSchoolsAll");