Answer Posted / m.ramarathna
Triggers are special kind of stored procedure that get
executed automatically when insert,update,delete operation
takes place on a table. Trigger can't be invoked on demand.
when delete,update,insert one data in the table ,that data
will stored in another one table.Nobody can't open the table
.That can open only by the select user.because of trigger
we give full importants to all data .
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