目录
第1关：使用流程控制语句的存储过程
任务描述
本关任务：创建一个存储过程，向表fibonacci插入斐波拉契数列的前n项。
sql
use fib;
-- 创建存储过程`sp_fibonacci(in m int)`，向表fibonacci插入斐波拉契数列的前m项，及其对应的斐波拉契数。fibonacci表初始值为一张空表。请保证你的存储过程可以多次运行而不出错。
drop procedure if exists sp_fibonacci;
delimiter $$
create procedure sp_fibonacci(in m int)
begin
######## 请补充代码完成存储过程体 ########
declare num1 int;
declare num2 int;
declare num3 int;
declare i int;
set num1 = 0;
set num2 = 1;
set i = 0;
while i < m DO
if i = 0 then
insert into fibonacci(n,fibn) values(i,num1);
end if;
if i = 1 then
insert into fibonacci(n,fibn) values(i,num2);
end if;
if i >= 2 then
set num3 = num1 + num2;
set num1 = num2;
set num2 = num3;
insert into fibonacci(n,fibn) values(i,num3);
end if;
set i = i+1;
END WHILE;
end $$
delimiter ;
第2关：使用游标的存储过程
任务描述
本关任务：使用游标编程存储过程为医院的某科室排夜班值班表。
sql
-- 编写一存储过程，自动安排某个连续期间的大夜班的值班表:
delimiter $$
create procedure sp_night_shift_arrange(in start_date date, in end_date date)
begin
declare no_doctor boolean default false;
declare no_nurse boolean default false;
declare no_data boolean default false;
declare d date;
declare doctor_name char(30);
declare doctor_type int;
declare nurse1_name char(30);
declare nurse2_name char(30);
declare director_found boolean default false;
declare director_name char(30);
declare cur_doctor cursor for select e_name,e_type from employee where (e_type) = 1 or (e_type = 2) order by e_id;
declare cur_nurse cursor for select e_name from employee where e_type = 3 order by e_id;
declare continue HANDLER for NOT FOUND set no_data = true;
open cur_doctor;
open cur_nurse;
set d = start_date;
while (d <= end_date) do
if director_found and (dayname(d) = 'Monday') then
set doctor_name = director_name;
set director_found = false;
else
fetch cur_doctor into doctor_name,doctor_type;
set no_doctor = no_data;
if no_doctor then
set no_data = false;
close cur_doctor;
open cur_doctor;
fetch cur_doctor into doctor_name,doctor_type;
set no_doctor=no_data;
end if;
if dayname(d) in ('Saturday','Sunday') and (doctor_type = 1) then
set director_found = true;
set director_name = doctor_name;
if no_doctor then
set no_data = false;
close cur_doctor;
open cur_doctor;
fetch cur_doctor into doctor_name,doctor_type;
set no_doctor = no_data;
else
fetch cur_doctor into doctor_name,doctor_type;
set no_doctor = no_data;
if no_doctor then
set no_data = false;
close cur_doctor;
open cur_doctor;
fetch cur_doctor into doctor_name,doctor_type;
set no_doctor = no_data;
end if;
end if;
end if;
end if;
fetch cur_nurse into nurse1_name;
set no_nurse = no_data;
if no_nurse then
set no_data = false;
close cur_nurse;
open cur_nurse;
fetch cur_nurse into nurse1_name;
end if;
fetch cur_nurse into nurse2_name;
set no_nurse = no_data;
if no_nurse then
set no_data = false;
close cur_nurse;
open cur_nurse;
fetch cur_nurse into nurse2_name;
end if;
insert into night_shift_schedule values(d,doctor_name,nurse1_name,nurse2_name);
set d = adddate(d,interval 1 day);
end while;
end$$
delimiter ;
/* end of your code */ 第3关：使用事务的存储过程
任务描述
本关任务：编写实现转账功能的存储过程。
sql
use finance1;
-- 在金融应用场景数据库中，编程实现一个转账操作的存储过程sp_transfer_balance，实现从一个帐户向另一个帐户转账。
-- 请补充代码完成该过程：
delimiter $$
create procedure sp_transfer(
IN applicant_id int,
IN source_card_id char(30),
IN receiver_id int,
IN dest_card_id char(30),
IN amount numeric(10,2),
OUT return_code int)
BEGIN
start transaction;
set return_code = 0;
if exists (select * from bank_card
where b_number = source_card_id and
b_c_id = applicant_id and
b_type = '储蓄卡' and
b_balance >= amount) and
exists (select * from bank_card
where b_number = dest_card_id and
b_c_id = receiver_id)
then
update bank_card set b_balance =
if(b_type = '信用卡', b_balance - amount, b_balance + amount)
where b_number = dest_card_id;
update bank_card
set b_balance = b_balance - amount where b_number = source_card_id;
set return_code = 1;
end if;
commit;
END$$
delimiter ;
/* end of your code */