Sql Server中的表访问方式Table Scan, Index Scan, Index Seek
SubTotal, TaxAmt, Freight, TotalDue, Comment, rowguid, ModifiedDate) SELECT RevisionNumber, OrderDate, DueDate, ShipDate, Status, OnlineOrderFlag, SalesOrderNumber, PurchaseOrderNumber, AccountNumber, CustomerID, SalesPersonID, TerritoryID, BillToAddressID, ShipToAddressID, ShipMethodID, Cr