Classes of SQL Server Triggers In SQL Server, there are two categories of Triggers: DDL (Data Definition Language)–This category of Triggers are activated by structure-changing events such as the creation, modification, or drop of a table, as well as by some server-related events, such as...
Include the trigger definitions in your selection with the use of a standard SQL Server function.SELECT t.name AS TriggerName, OBJECT_DEFINITION(t.object_id) AS TriggerDefinition FROM sys.objects AS o INNER JOIN sys.triggers AS t ON t.parent_id = o.object_i...
DDL Trigger DML Trigger DDL Triggers in SQL Server The DDL triggers are fired in response to DDL (Data Definition Language) command events that start with Create, Alter, and Drop, such as Create_table, Create_view, drop_table, Drop_view, and Alter_table....
SQL Server 2005得很多很增功能之一就是数据定义语言 (DDL) 触发器。在SQL Server 7.0和2000中,我们使用数据操作语言 (DML) 触发器,当INSERT,UPDATE或者DELETE语句被执行的时候执行一段SQL语句或存储过程,它们只能用于表或视图。 在SQL Server 2005中,我们可以在DDL语句上建立一个触发器来执行任何操作。触发器的作...
SQL Server implements triggers as a special type of stored procedure, automatically invoked based on the trigger definition and modification to data in a table or view. With theTriggerscollection, you can: Create a SQL Server trigger.
create(TriggerDefinition, RequestOptions) Create a trigger. Azure Cosmos DB supports pre and post triggers defined in JavaScript to be executed on creates, updates and deletes. For additional details, refer to the server-side JavaScript API documentation. query(SqlQuerySpec, FeedOptions) Query all ...
The definition of the execution model is recursive. For example, a given SQL statement can cause a BEFORE row trigger to be fired and an integrity constraint to be checked. That BEFORE row trigger, in turn, might perform an update that causes an integrity constraint to be checked and an ...
Types of SQL Triggers In SQL Server, we have 3 groups of triggers: DML (data manipulation language) triggers – We’ve already mentioned them, and they react to DML commands. These are – INSERT, UPDATE, and DELETE DDL (data definition language) triggers – As expected, triggers of th...
prevent any results from being returned from a DML trigger, do not include either SELECT statements or variable assignments in the definition of the trigger. If variable assignment must occur in a trigger, use a SET NOCOUNT statement before the trigger to eliminate the return of any result sets...
An optional trigger restriction can be included in the definition of a row trigger by specifying a Boolean SQL expression in a WHEN clause. If included, the expression in the WHEN clause is evaluated for each row that the trigger affects. If the expression evaluates to TRUE for a row, then...