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You have no control over which type is fired first, and whichever type is fired after the first type will see any changes made by the first type, and that cascades down (third type sees changes made by the second type, and so on). There are a great many things you can do with triggers, whether they are based on DML statements or system events.
Finally, the mutating table error, ORA-04091 table owner.table_name is mutating, trigger/function may not see it has made DBAs trigger-happy in ways we would rather they not be exposed to. As a developer or DBA (or both), there is no such thing as having too many tricks up your sleeve.
Conversely, you do not want the correct trigger to fire late.Oracle places a size limit of 32KB on a trigger statement. Up to the question mark, this article used about 25KB, using around 870 words and over 4,000 characters, just to give you a rough idea of how much code you can write under 32KB. Several other restrictions and one interesting restriction has to do with the order in which triggers are fired.So what are some design issues when considering the use of triggers?See here why triggers are nor the best choice for data validation A trigger is like an IDMS user exit, an opening in the code where you can branch out and "do your own thing", prior to performing the insert, update or delete.The problems with Oracle triggers includes: Oracle defines triggers as "procedures that are stored in the database and implicitly run, or fired, when something happens." [Page 15-1, Application Developer's Guide] What is the "something" that happens to make a trigger fire?