The four approaches contrast sharply, as do the features themselves.
Triggers are dynamic.
Driven by events or by the clock, they start a stored procedure. Also, stored procedures may be requested from a client application and executed from remote server workstations. Some experts believe that commonly used procedures should be stored with the database rather than with each application. Benefits include improved application reliability, lower development and maintenance costs, and reduced network traffic. In addition, they say, it is easier to enforce business rules from a single server than on many clients.