By Jim Melton
complicated SQL:1999 - realizing Object-Relational and different complex positive aspects is the practitioner's guide to the standard's complicated gains. it's not a re-presentation of the normal, yet particularly an authoritative, in-depth consultant to its sensible program. Like its better half, SQL:1999 - figuring out Relational Language parts , which defined the standard's uncomplicated gains, this ebook will aid you make your purposes either potent and standard-compliant.
this convenient reference has a modular layout so that you can discover particular subject matters comfortably. it's both helpful to these upgrading from past types of SQL and people without prior adventure. Written by way of the standard's wonderful editor, complex SQL:1999 will whole your wisdom and help your abilities like no different e-book can. * Focuses fullyyt at the concerns that subject to programmers who're connecting purposes to databases. * info SQL:1999's item amenities, together with dependent user-defined forms, typed tables, user-defined workouts, and regimen invocation. * Examines amenities new to SQL, together with these with regards to online analytical processing (OLAP), administration of exterior info (SQL/MED), and Java help. * Covers the continuing improvement of XML aid. * comprises appendices that disguise the SQL:1999 annexes, a SQL:1999 instance utilizing UDTs, prestige codes, and priceless details at the standardization approach.
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Extra resources for Advanced SQL:1999: Understanding Object-Relational and Other Advanced Features (The Morgan Kaufmann Series in Data Management Systems)
Most end usersmby w h o m I mean the armies of application developers who are responsible for the majority of corporations' data processing and information systems~are far too busy trying to respond to business requirements thrown at them daily to want to spend time inventing new data types. Instead, I anticipate that information systems groups are likely to assign responsibilities for inventing these new data types to a small number of system programmers or database administrators, who will design the types and their behaviors to make available to the application programmers, who, in turn, will use them to build the bread-and-butter applications needed by their organizations.
For example, the fact that SQL:1999's object model doesn't allow for private attributes, but only public attributes, makes it impossible to completely hide the implementation details of types. In passing, I note that structured types defined as Serial izabl e Java types are not even required to have methods defined on them, increasing the encapsulation characteristic considerably. 17. 32 Chapter 2 User-Defined Types tation. 1, you see the optional clause AS representation; it is that clause in which you would specify all of the attributes of a user-defined type.
1 contains the syntax of the CREATE TYPE statement. Please don't be too intimidated by the m a n y different parts of this statement. I'll get to t h e m all in due time. My purpose in giving you the entire syntax now is so that I can refer back to it as I get to each c o m p o n e n t in the discussion of structured types throughout the rest of this chapter. 1 CREATETYPESyntax CREATE TYPE type-name [ UNDER supertype-name ] [
Advanced SQL:1999: Understanding Object-Relational and Other Advanced Features (The Morgan Kaufmann Series in Data Management Systems) by Jim Melton