Creating an Abstraction Layer in Software

Encoder Code 128A in Software Creating an Abstraction Layer
11
ANSI/AIM Code 128 Generator In Visual C#.NET
Using Barcode printer for .NET framework Control to generate, create Code 128 image in .NET framework applications.
Creating an Abstraction Layer
Print Code 128 Code Set A In .NET
Using Barcode encoder for ASP.NET Control to generate, create USS Code 128 image in ASP.NET applications.
The really cool thing is that the MERGE syntax works with single or multiple rows of source data, so our single MERGE statement can insert, update, or even delete address records from the address table for the specified customer Again, we are not saying that you have to use MERGE; you can build all the logic in separate steps, but a single T-SQL statement is likely to be more efficient than anything you can write We highly recommend that you look at MERGE in further detail
Generate Code 128B In .NET Framework
Using Barcode printer for VS .NET Control to generate, create Code 128A image in .NET framework applications.
Other Components of an Abstraction Layer
Generating Code-128 In Visual Basic .NET
Using Barcode generation for .NET framework Control to generate, create Code 128B image in VS .NET applications.
Although views and stored procedures will make up the bulk of your exposed abstraction layer, you will use many other SQL Server objects in your unexposed abstraction layer First, let s define exposed versus unexposed portions of your abstraction layer Simply put, anything that is meant to be consumed by your users or an application is exposed; anything consumed only by other elements of your abstraction layer is unexposed For example, user-defined functions are extremely useful in a SQL Server database, but they typically perform small tasks as part of a larger process Therefore, UDFs are generally called by stored procedures or used in a view and are not usually exposed to users or applications directly As you build your abstraction layer you may find that a UDF or a trigger is appropriate for handling a task, and in these situations you should take full advantage of these objects Just keep in mind that they will probably be called by another object and not the user
Generate Code 128 Code Set A In Java
Using Barcode printer for Java Control to generate, create Code-128 image in Java applications.
Summary
Barcode Creator In Java
Using Barcode creation for Java Control to generate, create bar code image in Java applications.
If you take nothing else away from this book, remember that abstraction layers are extremely important They provide extensibility and flexibility unrivaled by databases that lack abstraction layers In addition, abstraction layers provide you with an extra layer of security and are handy during your next Sarbanes-Oxley audit At this point, we should have a complete database solution and our customer should be ready to begin using the database We hope that if you follow the guidelines we have laid out in this book, you will be able to design and implement successful databases Remember that there are many ways to accomplish the same goals, so take what you have learned here and incorporate it into your own practices and techniques
Make DataMatrix In Visual C#
Using Barcode maker for Visual Studio .NET Control to generate, create ECC200 image in Visual Studio .NET applications.
A P P E N D I X
Barcode Creator In .NET
Using Barcode generation for ASP.NET Control to generate, create barcode image in ASP.NET applications.
SAMPLE LOGICAL MODEL
Generate Barcode In Visual Studio .NET
Using Barcode encoder for ASP.NET Control to generate, create bar code image in ASP.NET applications.
Appendix A
Paint European Article Number 13 In Java
Using Barcode drawer for Java Control to generate, create EAN-13 image in Java applications.
Sample Logical Model
Print Code 39 Full ASCII In Visual Basic .NET
Using Barcode printer for .NET Control to generate, create Code 39 Full ASCII image in .NET framework applications.
Logical Orders Submodel
Read ANSI/AIM Code 128 In Visual Studio .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET framework applications.
Logical Inventory Submodel
Create Barcode In Visual Basic .NET
Using Barcode printer for .NET framework Control to generate, create bar code image in VS .NET applications.
Logical Inventory Submodel
Bar Code Reader In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
Appendix A
Encode Bar Code In .NET
Using Barcode printer for ASP.NET Control to generate, create barcode image in ASP.NET applications.
Sample Logical Model
Data Matrix ECC200 Reader In .NET
Using Barcode decoder for .NET Control to read, scan read, scan image in .NET framework applications.
Logical Product Submodel
Reading ANSI/AIM Code 39 In VS .NET
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
Logical Lists Submodel
Make Code 39 Extended In Java
Using Barcode printer for Java Control to generate, create Code 39 Full ASCII image in Java applications.
Logical Web Session Submodel
Encode Code 3/9 In Visual Studio .NET
Using Barcode maker for ASP.NET Control to generate, create Code 39 image in ASP.NET applications.
Logical Lists Submodel
Drawing Code 128 Code Set B In .NET Framework
Using Barcode creator for ASP.NET Control to generate, create Code 128C image in ASP.NET applications.
This page intentionally left blank
A P P E N D I X
SAMPLE PHYSICAL MODEL
Appendix B
Sample Physical Model
Physical Orders Submodel
Physical Inventory Submodel
Physical Inventory Submodel
Appendix B
Sample Physical Model
Physical Product Submodel
Physical Lists Submodel
Physical Web Session Submodel
Physical Lists Submodel
This page intentionally left blank
A P P E N D I X
SQL SERVER 2008 RESERVED WORDS
Use of the following keywords should be avoided in any code, column names, or object names These terms are keywords for the SQL Server engine, and their use could confuse the engine For more keywords, including ODBC reserved words and a list of possible future keywords, see SQL Server Books Online
ADD ALL ALTER AND ANY AS ASC AUTHORIZATION BACKUP BEGIN BETWEEN BREAK BROWSE BULK BY CASCADE CASE CHECK CHECKPOINT CLOSE CLUSTERED COALESCE COLLATE COLUMN COMMIT COMPUTE CONSTRAINT CONTAINS CONTAINSTABLE CONTINUE CONVERT CREATE CROSS CURRENT CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER CURSOR DATABASE DBCC DEALLOCATE DECLARE DEFAULT DELETE DENY DESC DISK DISTINCT DISTRIBUTED DOUBLE DROP DUMP ELSE END ERRLVL ESCAPE EXCEPT EXEC EXECUTE EXISTS EXIT EXTERNAL FETCH FILE FILLFACTOR (continued)
Appendix C SQL Server 2008 Reserved Words
(Continued) FOR FOREIGN FREETEXT FREETEXTTABLE FROM FULL FUNCTION GOTO GRANT GROUP HAVING HOLDLOCK IDENTITY IDENTITY_INSERT IDENTITYCOL IF IN INDEX INNER INSERT INTERSECT INTO IS JOIN KEY KILL LEFT LIKE LINENO LOAD NATIONAL NOCHECK NONCLUSTERED NOT NULL NULLIF OF OFF OFFSETS ON OPEN OPENDATASOURCE OPENQUERY OPENROWSET OPENXML OPTION OR ORDER OUTER OVER PERCENT PIVOT PLAN PRECISION PRIMARY PRINT PROC PROCEDURE PUBLIC RAISERROR READ READTEXT RECONFIGURE REFERENCES REPLICATION RESTORE RESTRICT RETURN REVERT REVOKE RIGHT ROLLBACK ROWCOUNT ROWGUIDCOL RULE SAVE SCHEMA SECURITYAUDIT SELECT SESSION_USER SET SETUSER SHUTDOWN SOME STATISTICS SYSTEM_USER TABLE TABLESAMPLE TEXTSIZE THEN TO TOP TRAN TRANSACTION TRIGGER TRUNCATE TSEQUAL UNION UNIQUE UNPIVOT UPDATE UPDATETEXT USE USER VALUES VARYING VIEW WAITFOR WHEN WHERE WHILE WITH WRITETEXT