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Topic: Database Trigger

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	Examiner's Resources- Trigger Pull Database
		As pressure is applied to the trigger, the gauge is watched and the amount of pressure required to release the sear is recorded.
		Because it is a subject that comes up so often I thought it would be handy to make a database application that would allow me to search through the average trigger pull data of the firearms that have come in off the streets.
		TRIGGER PULL DATA SEARCH is an application that allows for searches to be made for trigger pull data of specific firearms, models, calibers, and types.
	www.afte.org /ExamResources/triggerpullDB.htm (602 words)

	7.6 Using Database Triggers
		A database trigger is a procedure that is automatically invoked by the DBMS in response to a change event against the database.
		While database triggers are especially suited for auditing and statistical gathering, there is no need or no way to write a standard for limiting the scope of their use by application programmers.
		The database trigger documentation should include the name of the trigger, the firing event or operation, the frequency of the firing, the name of the source table, the name of any table(s) affected by the trigger, a short description of the actions of the trigger.
	www.omsar.gov.lb /ICTSG/104DB/7.6_Using_Database_Triggers.htm (306 words)

	DBMS - May 1996 - Server Side
		A trigger was initially defined as a "predefined database procedure, conditionally or unconditionally succeeding or preceding other database operations automatically" (K.P Eswaran, "Specifications, Implementations and Interactions of a Trigger Subsystem in an Integrated Database System," IBM Research Report, RJ1820, 1976).
		An Oracle trigger cannot query or perform a manipulation operation on a "mutating" table, where the trigger may see an inconsistent view of the table, because there is a transaction pending on the table (the firing transaction, in this case).
		Although triggers can be nested to 16 levels, when a trigger's action causes an update on the same row in the same table, the trigger is not fired again.
	www.dbmsmag.com /9605d17.html (3114 words)

	MS SQL - Community Site Map
		Database 'msdb' cannot be opened due to inaccessible files or insufficient memory or disk space.
		Trigger: To fill another Database with using Stored Procedures of the other Database
		I have a database on a network drive that I use for archiving purposes, but when the server is rebooted the database becomes suspect.
	www.thescripts.com /forum/archive/index.php/f-61.html (1806 words)

	Understanding DDL triggers in SQL Server 2005 (Site not responding. Last check: 2007-10-26)
		For instance, you can write a DDL trigger to prevent certain changes to your database schema, or maybe allow the change but record it in a log table for auditing purposes.
		The trigger will still exists as an object; however, it will not be triggered by any of statements on which it was programmed.
		Enabling a DDL trigger causes it to fire in the same way the trigger did when it was originally created.
	www.teratrax.com /articles/ddl_trigger_sql_server.html (370 words)

	What is a trigger -uCertify
		A trigger is a kind of procedure that executes implicitly when a table or view is modified or some user actions or database system actions occur.
		A database trigger executes implicitly when a triggering event such as a DML statement (INSERT, UPDATE, or DELETE) on a table or view, or a DDL statement (CREATE or ALTER) is issued, regardless of which database user is connected or which application is being used.
		A DDL trigger is a database trigger whose triggering event is a Data Definition Language (DDL) statement, i.e., a DDL trigger fires when a DDL statement (such as a CREATE, ALTER, or DROP statement) is executed in the database or a particular schema.
	www.ucertify.com /article/OCP/what-is-a-trigger.html (1688 words)

	Enforcing Business Logic using DB2 Triggers, Java UDFs, and the JavaMail API
		Go ahead and execute similar statements to populate your sample database with the rest of the dummy data records shown in Table 2.
		If you are unfamiliar with triggers, a one-sentence crash course will inform you that triggers are a set of actions that occur as the direct result of a delete, insert, or update operation on a specific table.
		Triggers are an extremely powerful functionality made available to the database programmer.
	www-128.ibm.com /developerworks/db2/library/techarticle/0205bhogal/0205bhogal.html (2189 words)

	CREATE TRIGGER (Transact-SQL) (Site not responding. Last check: 2007-10-26)
		Triggers can be created in the SQL Server 2005 Database Engine directly from Transact-SQL statements or from methods of assemblies that are created in the Microsoft.NET Framework common language runtime (CLR) and uploaded to an instance of SQL Server.
		A trigger is designed to check or change data based on a data modification or definition statement; it should not return data to the user.
		A trigger that includes either SELECT statements that return results to the user or statements that perform variable assignment requires special handling; these returned results would have to be written into every application in which modifications to the trigger table are allowed.
	msdn2.microsoft.com /en-us/library/ms189799.aspx (3649 words)

	Implementing the Physical Database > Trigger Utilization (Site not responding. Last check: 2007-10-26)
		trigger can be used to archive data when it is deleted, to send a notification that the new data has been added or changed, or to initiate any other process you might want to automate based on data activity.
		INSTEAD OF trigger can be used to perform more advanced activities (such as advanced data checking), to enable updates in a view to occur across multiple tables, and to perform many other functions that might be necessary in place of a triggering activity.
		Triggers represent a mechanism in which code can be executed based on activity in the data.
	www.quepublishing.com /articles/article.asp?p=394697&seqNum=6 (224 words)

	p4 triggers
		Perforce triggers are user-written scripts that are called by a Perforce server whenever certain operations (such as changelist submission or changes to forms) are performed.
		trigger type to create triggers that fire after changelist creation, but before files are transferred to the server.
		Triggers are run in the order listed in the table; if a trigger script fails for a specified type, subsequent trigger scripts also associated with that type are not run.
	www.perforce.com /perforce/doc.051/manuals/cmdref/triggers.html (1081 words)

	Ease database management and automate functions with triggers in MySQL, from Melonfire - White Papers, Webcasts and ...
		Overview: In database terminology, a trigger is a stub of code that is automatically activated when a particular database event, such as an INSERT or DELETE, occurs.
		Triggers are handy for logging, to automatically "cascade" changes down from a single table to other linked tables, or to ensure that table relationships are automatically updated.
		Triggers are new in MySQL 5.x, and have been gradually improving as new versions of the 5.x code tree have emerged.
	whitepapers.zdnet.com /abstract.aspx?docid=253409&promo=200111 (480 words)

	Implementing the Physical Database > Trigger Utilization (Site not responding. Last check: 2007-10-26)
		trigger can be used to archive data when it is deleted, to send a notification that the new data has been added or changed, or to initiate any other process you might want to automate based on data activity.
		INSTEAD OF trigger can be used to perform more advanced activities (such as advanced data checking), to enable updates in a view to occur across multiple tables, and to perform many other functions that might be necessary in place of a triggering activity.
		Triggers represent a mechanism in which code can be executed based on activity in the data.
	www.samspublishing.com /articles/article.asp?p=415181&seqNum=6 (253 words)

	DB2 Basics: Creating Your First Trigger in DB2 Universal Database
		In trigger terminology, the INSERT, DELETE, or UPDATE that causes a trigger to be fired is known as the triggering event.
		Whether a trigger fires before or after the triggering event is known as the activation time of the trigger.
		Triggers are a powerful DB2 database feature that can be used to polarize business logic to the relational database.
	www.ibm.com /developerworks/db2/library/techarticle/0308bhogal/0308bhogal.html (1652 words)

	Triggers
		Triggers are implicitly fired by Oracle when a triggering event occurs, no matter which user is connected or which application is being used.
		trigger for this purpose, you can eliminate unnecessary processing of the triggering statement and its eventual rollback in cases where an exception is raised in the trigger action.
		Triggers created on startup and shutdown events have to be associated with the database.
	www.stanford.edu /dept/itss/docs/oracle/9i/server.920/a96524/c18trigs.htm (3555 words)

	Ease database management and automate functions with triggers in MySQL
		Triggers are handy for logging, to automatically "cascade" changes down from a single table to other linked tables, or to ensure that table relationships are automatically updated.
		The idea here is to define a trigger on the data table, such that every time a new name is inserted into it, the running total in the chars table is automatically updated with the number of characters in the newly-inserted record.
		A common use of triggers is to set up automatic "audit trails" to record the changes made by different users to a database.
	builder.com.com /5100-6388_14-6108787.html (1101 words)

	What is trigger? - a definition from Whatis.com
		In a database, a trigger is a set of Structured Query Language (SQL) statements that automatically "fires off" an action when a specific operation, such as changing data in a table, occurs.
		Triggers are used to preserve data integrity by checking on or changing data in a consistent manner.
		A full-text database is a compilation of documents or other information in the form of a database in which the complete text of each referenced...
	searchoracle.techtarget.com /sDefinition/0,,sid41_gci346415,00.html (235 words)

	About the Database Trigger Editor
		When defining a database trigger, you can specify the trigger timing, that is, you can specify when the trigger action is to be executed in relation to the triggering statement: before or after the triggering statement.
		A triggering event or statement is the SQL statement that causes a trigger to be fired.
		For example, when the current object is a trigger attached to an item, choosing New displays the Triggers LOV that allows you to create a new trigger attached to the same item.
	www.oracle.com /webapps/online-help/forms/10g/state/content/navId.3/navSetId._/vtTopicFile.designing_forms\|storedpr\|f50abdbtr~html/vtTopicId. (527 words)

	Triggers in Oracle
		Use triggers only for centralized, global operations that should be fired for the triggering statement, regardless of which user or database application issues the statement.
		You would write such a trigger to place restrictions on DML statements issued on this table (such as when such statements could be issued).
		Although triggers can be written to enforce many of the same rules supported by Oracle's declarative integrity constraint features, triggers should only be used to enforce complex business rules that cannot be defined using standard integrity constraints.
	courses.csusm.edu /cs643yo/slides/triggers.htm (1912 words)

	DROP TRIGGER (Transact-SQL) (Site not responding. Last check: 2007-10-26)
		DATABASE must be specified if it was also specified when the trigger was created or modified.
		To drop a DML trigger requires ALTER permission on the table or view on which the trigger is defined.
		Because DDL triggers are not schema-scoped and, therefore do not appear in the sys.objects catalog view, the OBJECT_ID function cannot be used to query whether they exist in the database.
	msdn2.microsoft.com /en-US/library/ms173497.aspx (644 words)

	22 Triggers
		This chapter discusses triggers, which are procedures stored in PL/SQL or Java that run (fire) implicitly whenever a table or view is modified or when some user actions or database system actions occur.
		Oracle fires multiple triggers in an unspecified, random order, if more than one trigger of the same type exists for a given statement; that is, triggers of the same type for the same statement are not guaranteed to fire in any specific order.
		When a trigger is fired, the tables referenced in the trigger action might be currently undergoing changes by SQL statements in other users' transactions.
	download-west.oracle.com /docs/cd/B14117_01/server.101/b10743/triggers.htm (3409 words)

	Handling Numbers
		A row-level trigger cannot read or modify the contents of a mutating table because a mutating table is in a state of flux.
		Another use for a trigger is to disallow a SQL statement or transaction by raising an exception.
		A trigger may have an optional clause that specifies a condition that must be true for the trigger to fire.
	docs.rinet.ru /Oru7na95/ch23.html (3456 words)

	Free Training
		Unlike the stored procedure and functions, which have to be called explicitly, the database triggers are fires (executed) or called implicitly whenever the table is affected by any of the above said DML operations.
		A triggering event can be an insert, update, or delete statement or a instance shutdown or startup etc. The trigger fires automatically when any of these events occur A trigger constraint specifies a Boolean expression that must be true for the trigger to fire.
		The trigger action is a procedure that contains the code to be executed when the trigger fires.
	www.exforsys.com /content/view/1351/240 (531 words)

	CREATE TRIGGER
		If you create a trigger on a base table of a materialized view, then you must ensure that the trigger does not fire during a refresh of the materialized view.
		If your application requires that one trigger be fired before another of the same type for the same statement, then combine these triggers into a single trigger whose trigger action performs the trigger actions of the original triggers in the appropriate order.
		Specify the trigger condition, which is a SQL condition that must be satisfied for the database to fire the trigger.
	download-west.oracle.com /docs/cd/B19306_01/server.102/b14200/statements_7004.htm (2643 words)

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