精通PL/SQL编程：数据库高效开发与优化技巧全解析

DECLARE
  -- 声明变量
  v_number NUMBER := 10;
  v_sum NUMBER := 0;
BEGIN
  -- 赋值
  v_sum := v_number + 5;

  -- 条件判断
  IF v_sum > 0 THEN
    DBMS_OUTPUT.PUT_LINE('v_sum is positive');
  ELSE
    DBMS_OUTPUT.PUT_LINE('v_sum is not positive');
  END IF;

  -- 循环
  WHILE v_number > 0 LOOP
    v_sum := v_sum + v_number;
    v_number := v_number - 1;
  END LOOP;

  DBMS_OUTPUT.PUT_LINE('The sum of numbers from 1 to ' || v_number || ' is: ' || v_sum);
END;
/