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Answer:
The database can detect only system-defined events.
Explanation:
A trigger is like a stored procedure that Oracle Database invokes automatically whenever a specified event occurs.trigger is like a stored procedure that Oracle Database invokes automatically whenever a specified event occurs.
Both triggers and constraints can constrain data input, but they differ significantly.
A constraint applies to both existing and new data. For example, if a database column has a NOT NULL constraint, then its existing data is NOT NULL and no DML statement can violate the NOT NULL constraint.
A trigger applies only to new data. For example, a trigger can prevent a DML statement from inserting a NULL value into a database column, but the column might contain NULL values that were inserted into the column before the trigger was defined or while the trigger was disabled
There might be insufficient storage space so your computer usually takes a longer time to load.The bigger your file, the longer it takes to load. So the solution is to clear up your storage space
