#1儲存過程
create procedure greeting()
begin
# 77 = 16 for username + 60 for hostname + 1 for '@'
declare user char(77) character set utf8;
set user = (select current_user());
if inster(user, '@') > 0 then
set user = substring_index(user, '@',1);
end if;
if user = '' then
set = 'earthling';
end if;
select concat('greetings,', user, '!') as greetig;
end;
#時間儲存函式
delimiter $$
create procedure show_time3()
begin
select 'local time is :', current_timestamp;
select 'utc time is :' , utc_timestamp;
end $$
delimiter ;
delimiter eof
create procedure show_time3()
select 'local time is:', current_timestamp;
select 'utc time is:', utc_timestamp;
end eof
delimiter ;
#2儲存函式
delimiter $
create function show_id_ord(id int)
returns int
reads sql data
begin
return (select count(*) from test where id = id)
end$
delimiter ;
delimiter $
create procedure update_test_test_id(p_id int, p_date int)
begin
update test set test_id = p_date where id = p_id;
end$
delimiter ;
delimiter $
create procedure select_test_id (out p_id int)
begin
select count(*) from test where id = p_id into p_id;
end $
delimiter ;
drop table if exists `user_info`;
create table `user_info` (
`id` int(10) unsigned not null auto_increment comment '使用者id',
`user_name` varchar(50) not null default '' comment '使用者名稱',
`gender` tinyint(1) not null default '0' comment '使用者性別;1:男,2:女',
`add_time` int(10) unsigned not null default '0' comment '使用者註冊時間',
`update_timne` timestamp not null default current_timestamp on update current_timestamp comment '使用者最後更新時間',
primary key (`id`) using btree,
key `user_name` (`user_name`),
key `gender` (`gender`),
key `add_time` (`add_time`)
) engine=myisam auto_increment=10 default charset=utf8 comment='使用者資訊表'
#3觸發器
delimiter $
create trigger ai_t after insert on user_info
for each row begin
inster into test(`test_id`) values((select test_id from test_id order by id desc limit 1 )+1)
end $
delimiter ;
delimiter $
create trigger bi_t before insert on t
for each row begin
set new.dt = current_timestamp;
if new.parent <0 then
set new.parent = 0;
elseif new.parent >100 then
set new.parent = 100;
end if;
end$
delimiter ;
#4建立事件
create event id_defined_min
on schedule every 0.02 hour
do delete from test where id <9 ;
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