The events that trigger SQL Server triggers which are actually stored t-sql codes are sql INSERT, UPDATE and DELETE statements executed on a sql database table. For example, if you create trigger to execute after Insert statement on a sql table, when a new row or a set of new rows are...
A SQL Server trigger is a piece of procedural code. It is just like a stored procedure which is only executed when a given event happens. There are different types of events that can fire a trigger. To name you a few, the insertion of rows in a table, a change in a table structure...
Example 2. A PL/pgSQL Trigger Procedure For Auditing This example trigger ensures that any insert, update or delete of a row in the emp table is recorded (i.e., audited) in the emp_audit table. The current time and user name are stamped into the row, together with the type of opera...
Below is an example trigger from the AdventureWorks2012 database. You’ll notice the syntax for a SQL trigger is very similar to that of a stored procedure. In fact, the trigger uses the same language to implement its logic as dostored procedures. In MS SQL, this isT-SQL; whereas in Or...
SQL INSERT Trigger – Example First, we’ll create a simple SQL trigger that shall perform check before the INSERT statement. 1 2 3 4 5 6 7 8 9 10 11 12 DROPTRIGGERIFEXISTSt_country_insert; GO CREATETRIGGERt_country_insertONcountryINSTEADOFINSERT ...
statement delimiter within the trigger definition. The following example illustrates these points. It defines anUPDATEtrigger that checks the new value to be used for updating each row, and modifies the value to be within the range from 0 to 100. This must be aBEFOREtrigger because the value ...
Oracle – PL/SQL Triggers CategoriesTagsoracle,plsql,trigger Drop table emp_changing_sal; CREATE TABLE emp_changing_sal(empid NUMBER, new_sal NUMBER, UPDATED_TIME DATE, UPDATED_BY VARCHAR2(15)); DROP trigger emp_change; CREATE TRIGGER emp_change ...
Inheritance Object SqlTriggerContext ExamplesThe following example shows a SqlTriggerContext object being used to determine if an Insert action occurred. If a row was inserted into the user's table, the user name and real name are retrieved from the inserted row and then added to the UserName...
Transact-SQL reference for the CREATE TRIGGER statement, which is used to create a DML, DDL, or logon trigger.
--查看数据库中所有触发器 https://docs.microsoft.com/en-us/sql/t-sql/statements/create-trigger-transact-sql?view=sql-server-ver15 -- 涂聚文(Geovin Du) edit https://www.mssqltips.com/sqlservertip/5909/sql-server-trigger-example/ select * from sysobjects where xtype='TR' -- exec sp_he...