Create DB trigger to Sql DB - asp.net

Question

Im new to DB stuff and I need to create DB trigger to azure SQL DB.
I've create MVC5 project with model first and I have this model which reflect the DB table.
public class Employee
{
public int Id { get; set; }
public string EmployeeName { get; set; }
public string EmpAddress { get; set; }
public string EmpEmail { get; set; }
public string EmpPhone { get; set; }
}
public class EmployeeDbContext : DbContext
{
public EmployeeDbContext()
: base("DefaultConnection")
{
}
public DbSet<Employee> EmployeeCollection { get; set; }
}
}
Now I want to create DB trigger for it and I try like following.(I take this example from SO and adjust it...)
Create Trigger Dbo.triggerName ON Employee
AFTER INSERT, Update, Delete
AS Begin
-- Log Deleted Rows and Old Value
Insert Into EmployeeCopy(Id ,EmployeeName, EmpAddress,EmpEmail,EmpPhone)
Select CURRENT_EMPLOYEE, Columns
From Deleted
-- Log Inserted Row and New Value
Insert Into EmployeeCopy(Id ,EmployeeName, EmpAddress,EmpEmail,EmpPhone)
Select CURRENT_EMPLOYEE, Columns
From Inserted
End
I want it to create new table which is EmployeeCopy and copy all the rows to it.
so this is my question (I new to this topic)
1. what is the trigger name?
2.Do I write the Insert into right ?
3. Select CURRENT_EMPLOYEE, Columns ..Here Im not sure if this is the right way to write it?

Answer 1

Your insert into statement may be changed (see below) - but you did not specify condition of your select => you will probably insert all rows from your deleted and Inserted tables on each trigger operation.
See more details about insert into, for example, here.
You should probably write and test your select statement as stand-alone query (just run it from New Query window), When you'll get expected results - put it in the trigger's logic.
Generally, I'll suggest to try each part of your trigger logic as stand-alone statements.
Create Trigger dbo.MyTrigger ON Employee
AFTER INSERT, Update, Delete
AS Begin
-- Log Deleted Rows and Old Value
Insert Into EmployeeCopy
Select (Id ,CURRENT_EMPLOYEE, EmpAddress,EmpEmail,EmpPhone)
From Deleted
WHERE Your_conditions_logic_here
-- Log Inserted Row and New Value
Insert Into EmployeeCopy
Select (Id ,CURRENT_EMPLOYEE, EmpAddress,EmpEmail,EmpPhone)
From Inserted
WHERE Your_conditions_logic_here
End