Mysql的儲存過程的使用方法

create

procedure 儲存過程名(引數列表)
begin
儲存過程體（一組合法的sql語句）
end

in stuname varchar(20

)

delimiter 結束標記

delimiter $

call 儲存過程名(實參列表)

;

select

*from admin;
delimiter $
create
procedure myp1(
)begin
insert
into admin(username,
`password`
)values
('john1'
,'0000'),
('lily'
,'0000'),
('rose'
,'0000'),
('jack'
,'0000'),
('tom'
,'0000');
end $
#呼叫call myp1(
)$

create

procedure myp2(
in beautyname varchar(20
))begin
select bo.
*from boys bo
right
join beauty b on bo.id = b.boyfriend_id
where b.name=beautyname;
end $
#呼叫call myp2(
'柳岩'
)$

create

procedure myp4(
in username varchar(20
),in password varchar(20
))begin
declare result int
default0;
#宣告並初始化
select
count(*
)into result#賦值
from admin
where admin.username = username
and admin.password = password;
select
if(result>0,
'成功'
,'失敗');
#使用end $
#呼叫call myp3(
'張飛'
,'8888'
)$

create

procedure myp6(
in beautyname varchar(20
),out boyname varchar(20
))begin
select bo.boyname into boyname
from boys bo
right
join
beauty b on b.boyfriend_id = bo.id
where b.name=beautyname ;
end $

create

procedure myp7(
in beautyname varchar(20
),out boyname varchar(20
),out usercp int
)begin
select boys.boyname ,boys.usercp into boyname,usercp
from boys 
right
join
beauty b on b.boyfriend_id = boys.id
where b.name=beautyname ;
end $
#呼叫call myp7(
'小昭'
,@name
,@cp
)$select
@name
,@cp$

create

procedure myp8(
inout a int
,inout b int
)begin
set a=a*2;
set b=b*2;
end $
#呼叫set@m=
10$set@n=
20$call myp8(@m,
@n)$
select@m,
@n$

drop

procedure p1;
drop
procedure p2,p3;
#×

desc myp2;

show
create
procedure myp2;

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