I'm trying to learn PL/SQL by simply assigning a variable from a select statement and then, to confirm it's working, print it sql output.
DECLARE ALLOW_STUFF NUMBER;
BEGIN
SELECT VAL_N INTO ALLOW_STUFF FROM MY_TABLE WHERE MY_KEY = 'ALLOW_ME';
DBMS_OUTPUT.PUT_LINE(ALLOW_STUFF);
END;
I'm using SQL Developer and/or SQL PLus. When I run this, all I get is
Anonymous block completed
Rather than than the value of MY_TABLE.VAL_N