A trigger is a special type of a database object which is automatically executed upon certain conditions – e.g. actions performed by the user. Currently, four types of triggers exist in SQL Server, and the first two are the most commonly used: DDL triggers (auditing CREATE, ALTER, DROP...
SQL Server triggers and the features that they expose. I will examine the differences between the two types of triggers while demonstrating the places where each can be useful. Then I'll show examples of using AFTER triggers that serve an important role in SQL Server-based applications. I ...
SQL Server provides triggers as a means of executing T-SQL code in response to database object, database, and server events. SQL Server 2008 implements three types of triggers: classic T-SQL Data Manipulation Language (DML) triggers, which fire in response to insert, update, and delete ev...
Types of DDL Triggers DDL Trigger Scope Specifying a Transact-SQL Statement or Group of Statements Related Tasks See Also Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance DDL triggers fire in response to a variety of Data Definition Language (DDL) events. These event...
SQL Server includes two general types of triggers: data manipulation language (DML) and data definition language (DDL) triggers. DML triggers can be used when INSERT, UPDATE, or DELETE statements modify data in a specified table or view. DDL triggers fire stored procedures in response to a...
TriggersHEARING AIDPAIRED COMPARISONFREQUENCY RESPONSEMULTI-MEMORYTriggers define the code that runs in response to specific events. There are three types of triggers available in SQL Serverdoi:10.1007/978-1-4302-5963-3_8Dmitri KorotkevitchApress...
There are two types of recursion: Direct recursion This recursion occurs when a trigger fires and performs an action that causes the same trigger to fire again. For example, an application updates tableT3; this causes triggerTrig3to fire.Trig3updates tableT3again; this causes triggerTrig3to fir...
SQL SERVER 2005 CLR 部署UDT,Triggers,Functions,Procedure,Aggregates ◆[CLR User-Defined Types] ●> A Simple Example: The PhoneNumber Type --Example in 第 201/705 页 Another important thing to remember is that methods and properties on user-defined types are case sensitive, even if the serv...
the transaction commits. As with other types of triggers, SQL Server returns an error if a logon trigger finishes execution with a transaction count of 0. TheROLLBACK TRANSACTIONstatement resets the transaction count to 0, even if the statement is issued inside a nested transaction.COMMIT TRANSA...
DROP TYPE StringArray --To enumerate the data for CLR user-defined type in the database: SELECT * FROM sys.types WHERE is_assembly_type = 1 ◆[CLR User-Defined Functions] If a T-SQL user-defined function can do the job in question, T-SQL is preferred—most of the time it will del...