MySQL知识总结（三）存储过程

CREATE PROCEDURE bruce_procedure ()

BEGIN

--1.声明变量

--2.执行业务逻辑

END

CREATE PROCEDURE bruce_procedure (

IN in_exam_id INT,

in_student_types_id VARCHAR (100)

)

BEGIN

--1.声明变量

--2.执行业务逻辑

END

--无参调用

Call bruce_procedure();

--有参调用

Call bruce_procedure(1,’2,1’);

Drop procedure bruce_procedure;

CREATE PROCEDURE sc_st_group_courses_class_procedure (

IN in_exam_id INT,

in_student_types_id VARCHAR (100)

)

BEGIN

-- 组织课程组关系id

DECLARE v_group_courses_id INT;

-- 考试组织id

DECLARE v_exam_group_id INT;

END

if stop = 1 then

leave cur_loop;

end if;

cur_loop : loop

//业务逻辑

end loop //结束循环

CREATE PROCEDURE sc_st_group_courses_class_procedure() 

BEGIN DECLARE STOP INT DEFAULT 0;

-- 创建游标

DECLARE cur CURSOR FOR (

select

group_courses_id,

exam_group_id,

courses_id,

class_id

from sc_group_courses_view WHERE group_class=‘class‘ and exam_id = in_exam_id

);

-- 游标捕捉越界异常

DECLARE CONTINUE HANDLER FOR SQLSTATE ‘02000‘ SET STOP = 1;

END

CREATE PROCEDURE sc_st_group_courses_class_procedure()

BEGIN DECLARE STOP INT DEFAULT 0;

-- 创建游标

DECLARE cur CURSOR FOR (

select

group_courses_id,

exam_group_id,

courses_id,

class_id

from sc_group_courses_view WHERE group_class=‘class‘ and exam_id = in_exam_id

);

-- 游标捕捉越界异常

DECLARE CONTINUE HANDLER FOR SQLSTATE ‘02000‘ SET STOP = 1;

-- 开启游标

OPEN cur;

-- 开始循环

cur_loop : loop

FETCH cur INTO

v_group_courses_id,

v_exam_group_id,

v_courses_id,

v_class_id

;

-- 判断游标溢出

if stop = 1 then

leave cur_loop;

end if;

-- 结束循环

END loop cur_loop;

-- 关闭游标

CLOSE cur;

END

select

max(sum_score),min(sum_score),avg(sum_score),STD(sum_score)

into

v_highest_score,

v_lowest_score,

v_average,

v_std

from a

;