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What is Trigger in Orcale Database
Oracle allows you to define procedures that are implicitly executed when an DML statement (insert ,update,delete) is issued against the associated table. These procedures are called database triggers.
A database trigger is procedural code that is automatically executed in response to certain events on a particular table or view in a database.
For example-
create a table marks
create table marks(rollno int primary key, name varchar(20),...
