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--创建存储过程proc_staffs
CREATE OR REPLACE PROCEDURE proc_staffs
(
section     NUMBER(6),
salary_sum out NUMBER(8,2),
staffs_count out INTEGER
)
IS
BEGIN
SELECT sum(salary), count(*) INTO salary_sum, staffs_count FROM hr.staffs where section_id = section;
END;
/

--创建存储过程proc_return.
CREATE OR REPLACE PROCEDURE proc_return
AS
v_num NUMBER(8,2);
v_sum INTEGER;
BEGIN
proc_staffs(30, v_sum, v_num);  --调用语句
dbms_output.put_line(v_sum||'#'||v_num);
RETURN;  --返回语句
END;
/

--调用存储过程proc_return.
CALL proc_return();

--清除存储过程
DROP PROCEDURE proc_staffs;
DROP PROCEDURE proc_return;

--创建函数func_return.
CREATE OR REPLACE FUNCTION func_return returns void
language plpgsql
AS $$
DECLARE
v_num INTEGER := 1;
BEGIN
dbms_output.put_line(v_num);
RETURN;  --返回语句
END $$;


-- 调用函数func_return
 CALL func_return();

-- 清除函数
 DROP FUNCTION func_return;