mysql trigger 지원

오늘보니 5.7까지 있는데
오래되면 오래 된거고.. 최근이라면 최근부터 mysql에서 trigger가 지원되나 보다.

Support for triggers is included beginning with MySQL 5.0.2. A trigger is a named database object that is associated with a table, and that activates when a particular event occurs for the table. Some uses for triggers are to perform checks of values to be inserted into a table or to perform calculations on values involved in an update. [링크 : http://dev.mysql.com/doc/refman/5.0/en/triggers.html]