Can I call a C program in trigger, and pass updated data to this program?

Can I call a C program in Oracle trigger, and pass updated data to this program?
Thank you

An update trigger has access to both the old and new values. Your update trigger can call an external procedure (a C program) and pass the old and new values as parameters. For example:
CREATE OR REPLACE TRIGGER <tname> BEFORE UPDATE OF <tab> FOR EACH ROW
BEGIN
pkg.proc(:old.col, :new.col);
END;
Where pkg.proc has been created as an external procedure.

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