1. Using New Data Types in 2008 Andrew Couch UK Access User Group www.ukaug.co.uk ASC associates www.upsizing.co.uk

5. What Data Types do the Products support? Access (2007) GUID Multi-value fields Share Point (2003) see next slide SQL Server (2008) Visual Studio (2005/8) n prefix for Unicode

6. Share Point (2003)

7. Share Point under the hood Data is held in the AllUserData table which has a generic set of fields, nvarchar1,nvarchar2......Text1,Text2.........

8. Access to Share Point Data Types; MOSS

12. Access Yes/No Data

13. Yes/No (without a default) Translated To SQL Server

14. Access Memo and OLE Data Types

15. Access Using SQL Server 2000 IMAGE and TEXT Data Types

16. Visual Studio Editing Records in DetailsView; issues with Text Data Type

17. Visual Studio and Image/OLE Data issues with Image Data Type

18. Access & SQL Server 2005 Varchar(max) and Varbinary(max)

19. Visual Studio DetailsView now works for Updates when using Varchar(max)

20. Visual Studio, Images and OLE still a problem with Varbinary(max) some people would suggest that image data should not directly held in the database and instead a text link is used to point to an external image file which works around this issue

24. Access allowing Updates to new Date and Time Data Types

26. Controlling Time Precision

29. With a little Magic

30. Geography Methods

32. Access Row Versioning & Timestamps Row Versioning SQLExecDirect: UPDATE "dbo"."authors" SET "au_fname"=? WHERE "au_id" = ? AND "au_lname" = ? AND "au_fname" = ? AND "phone" = ? AND "address" = ? AND "city" = ? AND "state" = ? AND "zip" = ? AND "contract" = ? Timestamps SQLExecDirect: UPDATE "dbo"."authors" SET "au_fname"=? WHERE "au_id" = ? AND "ts" = ? Timestamps improve efficiency and remove potential problems with rounding errors in numerical data

35. Example Visual Studio Update handling Null Values UpdateCommand = "UPDATE [Customers] SET [CompanyName] = @CompanyName WHERE [CustomerID] = @original_CustomerID COALESCE([CompanyName],'') = COALESCE(@original_ CompanyName,'')” For numerics use COALESCE([fieldname],0) For dates use COALESCE([fieldname],’ 1st January 1900’ ) Or ([CompanyName] = @original_CompanyName ) OR ([CompanyName] IS NULL and @original_CompanyName IS NULL) Or use SET ANSI_NULLS OFF