Constant
From Oracle FAQ
⧼orafaq-jumptonavigation⧽⧼orafaq-jumptosearch⧽
A constant as the name implies is a value that is not variable. It cannot be changed after it has been assigned to. By virtue of the fact that it cannot be modified a constant cannot be declared without also being initialised.
PL/SQL Example
DECLARE
-- c_someConstant CONSTANT NUMBER; -- ILLEGAL since no initial value has been supplied.
c_report_lines CONSTANT NUMBER := 80; -- Define a numeric constant
BEGIN
dbms_output.put_line('Report has '||c_report_lines||' lines');
END;
/
Also see
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