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What is trigger syntax?
Explanation of syntax: create trigger [trigger_name]: Creates or replaces an existing trigger with the trigger_name. [before | after]: This specifies when the trigger will be executed. {insert | update | delete}: This specifies the DML operation.
What is trigger syntax in SQL?
A trigger is a special type of stored procedure that automatically runs when an event occurs in the database server. DML triggers run when a user tries to modify data through a data manipulation language (DML) event. SQL Server lets you create multiple triggers for any specific statement.
What is the syntax of DML trigger?
SQL Server DML Trigger Syntax
| Argument | Description |
|---|---|
| FOR | AFTER | INSTEAD OF | Indicates when the trigger must fire when a given event happens, like an insert, update or delete event. |
| [INSERT], [UPDATE] , [DELETE] | The DML event (or list of events) that will cause the trigger to fire. |
How can I see all triggers in SQL Server?
To view database level triggers, Login to the server using SQL Server management studio and navigate to the database. Expand the database and navigate to Programmability -> Database Triggers. To view triggers at the server level, Login to Server using SSMS and navigate to Server Objects and then Triggers folder.
How is data captured in SQL Server create trigger?
SQL Server uses these tables to capture the data of the modified row before and after the event occurs. The following table shows the content of the INSERTED and DELETED tables before and after each event:
What does current _ user do in Transact-SQL?
This function returns the name of the current user. This function is equivalent to USER_NAME (). To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation. CURRENT_USER returns the name of the current security context.
When to use current user instead of group name?
If a Windows principal accessed the database by way of membership in a group, CURRENT_USER will return the name of the Windows principal instead of the group name. See SUSER_NAME (Transact-SQL) and SYSTEM_USER (Transact-SQL) to learn about how to return the login of the current user. A. Using CURRENT_USER to return the current user name
When to fire a trigger in SQL Server?
A single trigger can fire in response to one or more actions against the table. The NOT FOR REPLICATION option instructs SQL Server not to fire the trigger when data modification is made as part of a replication process.