NULL Statements

In PL/SQL programs, a NULL statement can be used to indicate "do nothing", which is also known as an empty statement.

A NULL statement acts as a placeholder and can give meaning to certain statements, improving the readability of the program.

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DECLARE
    ...
BEGIN
    ...
    IF v_num IS NULL THEN
        NULL; --No data needs to be processed.
    END IF;
END;
/