Database trigger. A database trigger is procedural code that is automatically executed in response to certain events on a particular table or view in a database. The trigger is mostly used for maintaining the integrity of the information on the database.
Assisted Opening Knives. An assisted opening knife is a type of everyday carry knife that allows the user to open its blade with one hand by applying pressure to the thumb stud or the flipper. In the closed position, the blade is generally held in place by a torsion bar.
Again, the federal law does not prohibit assisted-opening knives, but states have interpreted the law in different ways and often have other restrictions. For example, in some states, any knife  including assisted-opening knives  with a blade length of more than 2.5 inches is illegal to carry. You must refer to your state laws to determine whether your knife meets state requirements, but rest assured that assisted-opening knives are legal in all 50 states.