Answer / swarna.alizerla

The Validation Triggers are used to validate the data
entered int the parameter form.
If the parameter is having the number format and if the
varchar2 is entered then to restrict such situations the
VAlidation Triggers are used.

Answer / anuragrajverma

Validation Triggers:-
---------------------------
Validation Triggers are PL/SQL functions that are executed
when parameter values are
specified on the command line and when you accept the
Runtime Parameter Form. (Notice that this
means each Validation Trigger may fire twice when you
execute the report). Validation Triggers are
also used to validate the Initial Value of the parameter in
the Parameter property sheet.

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