Can we use delete in trigger?

Can we use delete in trigger?

If we want to execute multiple statements, we will use the BEGIN END block that contains a set of SQL queries to define the logic for the trigger. CREATE TRIGGER trigger_name AFTER DELETE. ON table_name FOR EACH ROW.

How do I create a delete trigger?

Expand the database that you want, expand Tables, and then expand the table that contains the trigger that you want to delete. Expand Triggers, right-click the trigger to delete, and then click Delete. In the Delete Object dialog box, verify the trigger to delete, and then click OK.

What is difference between trigger new and trigger newMap?

trigger. new is simply a list of the records being processed by the trigger, so if all you need to do is loop through them then you can use that. trigger. newMap just allows you to target specific records by Id should you not need to process everything, or if you need to map other records back to these.

How create trigger after Delete in SQL Server?

DECLARE @EmpID INT, @EmpName VARCHAR(50), @EmpEducation VARCHAR(50), @EmpOccupation VARCHAR(50), @EmpYearlyIncome DECIMAL (10, 2), @EmpSales DECIMAL (10, 2); Next, we used the SELECT Statement to select the deleted records. The following statements will select only one record from deleted rows.

Is mutating trigger function may not see it ORA 04091?

The Oracle mutating trigger error occurs when a trigger references the table that owns the trigger, resulting in the “ORA-04091: table name is mutating, trigger/function may not see it.” message. Don’t use triggers – The best way to avoid the mutating table error is not to use triggers.

What is a before DELETE trigger?

A BEFORE DELETE Trigger means that Oracle will fire this trigger before the DELETE operation is executed.

How create trigger after DELETE in SQL Server?

How to create a trigger after delete in SQL?

CREATE TRIGGER trigger_name AFTER DELETE ON table_name FOR EACH ROW trigger_body; Code language: SQL (Structured Query Language) (sql) In this syntax: First, specify the name of the trigger that you want to create in the CREATE TRIGGER clause. Second, use AFTER DELETE clause to specify the time to invoke the trigger.

Are there different triggers for insert and delete?

You can have three separate triggers, one for INSERT one for UPDATE one for DELETE. Since each trigger is different, there is no need for switch logic. Share Improve this answer Follow

How to create trigger for insert on tablea?

I think the general way to do this is to create a trigger for each action, like so: CREATE TRIGGER INSERT_ON_TABLEA ON TABLEA AFTER INSERT AS BEGIN SET NOCOUNT ON; — INSERT ON AUX TABLEB END GO CREATE TRIGGER DELETE_ON_TABLEA ON TABLEA AFTER DELETE AS BEGIN SET NOCOUNT ON; — DELETE ON AUX TABLEB END GO