By Jim Melton
complicated SQL:1999 - realizing Object-Relational and different complicated positive factors is the practitioner's guide to the standard's complex positive factors. it isn't a re-presentation of the normal, yet quite an authoritative, in-depth consultant to its sensible software. Like its spouse, SQL:1999 - knowing Relational Language parts , which defined the standard's simple beneficial properties, this booklet will make it easier to make your functions either powerful and standard-compliant.
this convenient reference has a modular structure so that you can discover particular themes very easily. it's both helpful to these upgrading from previous models of SQL and people without prior adventure. Written by means of the standard's exclusive editor, complicated SQL:1999 will whole your wisdom and help your talents like no different e-book can. * Focuses fullyyt at the concerns that subject to programmers who're connecting functions to databases. * information SQL:1999's item amenities, together with dependent user-defined kinds, typed tables, user-defined workouts, and regimen invocation. * Examines amenities new to SQL, together with these on the subject of online analytical processing (OLAP), administration of exterior facts (SQL/MED), and Java aid. * Covers the continued improvement of XML help. * comprises appendices that hide the SQL:1999 annexes, a SQL:1999 instance utilizing UDTs, prestige codes, and worthy details at the standardization method.
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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)
5, the syntax for invoking a m e t h o d differs slightly from that for invoking a function, since m e t h o d invocation requires that the argument that identifies the structured type instance that you're accessing be specified as an implicit a r g u m e n t m the name of some site preceding the name of the method. 1 Procedures, Functions, and Methods PSM-968 standardized for the first time the ability for SQL programmers to write functions and procedures (SQL-invoked routines) for use in their SQL code; those functions and procedures could be written in SQL or in any of several supported programming languages.
Then I'll get more specific and show you SQL's UDT facilities, with examples of creating UDTs and manipulating instances of those UDTs. This discussion includes the creation and use of userdefined functions and methods that applications can use to invoke appropriate behaviors of those UDT instances. ") I'll also let you see how SQL's UDTs can be used as the data types of columns in tables and even the types of SQL variables. In addition, you'll see how a UDT can be declared to be the "data type" of an entire table--such that the table's columns are intimately related to the UDT's attributes.
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. One routine, called an observer (or accessor in some object systems), is used whenever an application retrieves the value of the attribute; the other, called a mutator, is invoked to change the value of the attribute.
Advanced SQL:1999: Understanding Object-Relational and Other Advanced Features (The Morgan Kaufmann Series in Data Management Systems) by Jim Melton