Advanced SQL: 1999 - Understanding Object-Relational and by Jim Melton PDF

By Jim Melton

ISBN-10: 0080498841

ISBN-13: 9780080498843

ISBN-10: 1558606777

ISBN-13: 9781558606777

Complex SQL:1999 - figuring out Object-Relational and different complicated beneficial properties is the practitioner's guide to the standard's complex good points. it isn't a re-presentation of the normal, yet fairly an authoritative, in-depth consultant to its sensible software. Like its significant other, SQL:1999 - realizing Relational Language parts, which defined the standard's simple positive aspects, this ebook will help you make your purposes either powerful and standard-compliant.This convenient reference has a modular structure so that you can discover particular themes conveniently. it really is both valuable to these upgrading from past types of SQL and people with out prior adventure. Written by way of the standard's exclusive editor, complex SQL:1999 will entire your wisdom and aid your abilities like no different e-book can. * Focuses fullyyt at the matters that subject to programmers who're connecting purposes to databases.* info SQL:1999's item amenities, together with based user-defined varieties, typed tables, user-defined workouts, and regimen invocation.* Examines amenities new to SQL, together with these in relation to online analytical processing (OLAP), administration of exterior info (SQL/MED), and Java support.* Covers the continued improvement of XML support.* comprises appendices that hide the SQL:1999 annexes, a SQL:1999 instance utilizing UDTs, prestige codes, and necessary details at the standardization approach.

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Extra info for Advanced SQL: 1999 - Understanding Object-Relational and Other Advanced Features (The Morgan Kaufmann Series in Data Management Systems)

Sample text

The characteristic of types that permits you to make such internal changes transparently is called encapsulation. As the word suggests, the physical composition of a structured type can be hidden from the view of the applications that make use of the type and of instances of the type. Perhaps rather less surprising, applications also remain unaware of the details of the code that implement the behaviors of the type. SQL:1999 encapsulates each attribute of a structured type by providing a pair of built-in routines that are invoked whenever an application attempts to reference the type.

Instances of SQL's structured types are values, no less than instances of SQL's INTEGER type are values. 3, values of a structured type may, under certain circumstances, take on some characteristics of objects, but they are first and foremost values of their user-defined type. In SQL:1999, users may create any n u m b e r of structured types and use them as first-class types in their databases and applications. ) In addition to an internal structure, SQL's structured types can be associated with specific user-defined functions that are used for all comparisons of instances of the type, for casting values of the type to and from other types, and for implementing all sorts of behaviors (that is, semantics) of the type.

SQL:1999's procedures, as you would expect from your familiarity with other programming languages, are routines that do not return a value in any way other than through an explicit parameter. Those of you who are Java programmers know that the closest analog in that language is its void methods. Procedures in SQL, as in most other languages, are permitted to have parameters that are used for output as well as parameters that are used for input (and, for that matter, parameters that are used for both).

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Advanced SQL: 1999 - Understanding Object-Relational and Other Advanced Features (The Morgan Kaufmann Series in Data Management Systems) by Jim Melton

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