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17-Feb-2018 02:32

Here in the above Oracle PLSQL trigger syntax the ‘trigger_name’ is the name given to AFTER INSERT TRIGGER.

We cannot create an AFTER INSERT TRIGGER on an Oracle PLSQL VIEW.

And it does precisely that through its implementation of the datatype, such as a number or string.

It’s rare, in fact, that the data with which you are working is just a single value, so records and other composite datatypes are likely to figure prominently in your PL/SQL programs.

The ORA_LOGIN_USER is a function -- that returns information about the event that fired the trigger.

Here are the answers to the PL/SQL Challenge questions in last issue’s “Error Management” article: Answer 1: Choices (a), (c), and (d) all raise ORA-00001, also known as DUP_VAL_ON_INDEX inside PL/SQL code.

Now let’s create a trigger on ‘new_employee’ table so that whenever we are updating any employee record in the ‘new_employee’ table the same record also gets stored in ‘new_employee_duplicate’ table.

For full explanations of both of these answers, visit plsqlchallenge.com, register or log in, and click the Closed/Taken tab in Play a Quiz.

The Oracle PL/SQL language was designed to be a portable, high-performance transaction processing language that is tightly integrated with the SQL language.

Two correlation names exist for every column of the table being modified: one for the old column value, and one for the new column value.

oracle trigger inserting or updating-33

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PUT_LINE('Record successfully inserted into emp_backup table'); END; Second Problem: We want o update a record in the ’emp_backup’ table if a corresponding record is updated in the ’emp’ table.If a triggering statement includes a column list, the trigger is fired only when one of the specified columns is updated.If a triggering statement omits a column list, the trigger is fired when any column of the associated table is updated.We cannot update : NEW values with AFTER INSERT TRIGGER.



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