Constructor functions - PowerPoint PPT Presentation

Chapter 9: Object-Relational Databases

Chapter 9: Object-Relational Databases. Nested Relations Complex Types and Object Orientation Querying with Complex Types Creation of Complex Values and Objects Comparison of Object-Oriented and Object-Relational Databases. Object-Relational Data Models.

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Inheritance

Inheritance. The mechanism by which one class can inherit the properties of another. It allows a hierarchy of classes to be built, moving from the most general to the most specific. Base Class, Derived Class. Base Class Defines all qualities common to any derived classes. Derived Class

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Lecture 23

Lecture 23. XQuery 1.0 and XPath 2.0 Data Model. Example 31.7 – User-Defined Function. Function to return staff at a given branch. DEFINE FUNCTION staffAtBranch($bNo) AS element()* { FOR $S IN doc (“staff_list.xml”)//STAFF WHERE $S/@branchNo = $bNo ORDER BY $S/STAFFNO

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