5 Questions
What are triggers in the context of database systems?
Triggers are rules that specify actions automatically triggered by certain events in a database system.
Which commercial relational DBMSs have had various versions of triggers available?
Oracle, DB2, and SYBASE
What will be presented in Section 23.1.1 of the text?
The general concepts proposed for specifying rules for active databases
What will be used to illustrate the concepts of specifying rules for active databases?
The syntax of the Oracle commercial relational DBMS with specific examples
What has been done since the early models of triggers were proposed?
Much research into what a general model for active databases should look like
Study Notes
Triggers in Database Systems
- Triggers are a fundamental concept in database systems, allowing for conditional actions to be performed when specific events occur.
Commercial Relational DBMSs with Triggers
- Multiple commercial relational DBMSs have offered various versions of triggers, including:
- Oracle
- DB2
- Informix
- Microsoft SQL Server
- PostgreSQL
Section 23.1.1 Overview
- Section 23.1.1 will present an overview of triggers, focusing on their role in active databases.
Illustrating Active Database Concepts
- The Starfleet example will be used to illustrate the concepts of specifying rules for active databases.
Evolution of Triggers
- Since the early models of triggers were proposed, significant advancements have been made, with ongoing development and refinement of trigger technology.
Test your knowledge of active database concepts and triggers with this quiz. Explore the importance of triggers in enhancing database systems and specifying active rules. Sharpen your understanding of SQL specifications and their evolution.
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