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oracle, stored procedure, cursor

CREATE OR REPLACE PROCEDURE kevin_proc(x varchar) IS
a VARCHAR(20);
b VARCHAR(20);
CURSOR mycur(rn NUMBER) IS SELECT * from t_kevin_test WHERE ROWNUM<rn;
BEGIN
OPEN mycur(10);
LOOP FETCH mycur INTO a,b;
EXIT WHEN mycur%NOTFOUND;
Dbms_Output.put_line('a: '||a);
Dbms_Output.put_line('b: '||b);
END LOOP;
CLOSE mycur;
begin
dbms_output.put_line (x);
end;
END;


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