I'm trying to determine withing if If I should create or alter and trigger. My Code is below.

```
IF OBJECT_ID(N'Sales.bonus_reminder', N'TR') IS NOT NULL
    ALTER TRIGGER Sales.bonus_reminder
    ON Sales.SalesPersonQuotaHistory
    AFTER INSERT
    AS RAISERROR ('Notify Compensation', 16, 10);
else
    CREATE TRIGGER Sales.bonus_reminder
    ON Sales.SalesPersonQuotaHistory
    WITH ENCRYPTION
    AFTER INSERT, UPDATE 
    AS RAISERROR ('Notify Compensation', 16, 10);

```

The errors I'm getting are :

* Incorrect syntax near else
* Create trigger should be the only
statement in batch.

How this code should look like?