时间:2021-07-01 10:21:17 帮助过:8人阅读
Mysql存储过程创建语法,代码如下:
CREATE PROCEDURE和CREATE FUNCTION :
代码如下:
CREATE PROCEDURE sp_name ([proc_parameter[,...]])
[characteristic ...] routine_body
CREATE FUNCTION sp_name ([func_parameter[,...]])
RETURNS type
[characteristic ...] routine_body
proc_parameter:
[ IN | OUT | INOUT ] param_name type
func_parameter:
param_name type
type:
Any valid MySQL data type
characteristic:
LANGUAGE SQL
| [NOT] DETERMINISTIC
| { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }
| SQL SECURITY { DEFINER | INVOKER }
| COMMENT 'string'
routine_body:
Valid SQL procedure statement or statements
代码如下:
Create procedure sp_Name ([proc_parameter ])
routine_body
这里的参数类型可以是 IN OUT INOUTT,意思和单词的意思是一样的,IN 表示是传进来的参数,OUT 是表示传出去的参数,INOUT 是表示传进来但最终传回的参数,代码如下:
代码如下:
Create functionsp_Name ([func_parameter ])
Returns type
Routine_body
Returns type 指定了返回的类型,这里给定的类型与返回值的类型要是一样的,否则会报错,下面是一个简单的例子,代码如下:
代码如下:
mysql> delimiter //
mysql> create procedure g
-> begin
-> select version() i
-> end
-> //
Query OK, 0 rows affected
mysql> call getversion(@a
-> //
Query OK, 0 rows affected
mysql> select @a;
-> //
+---------------------+
| @a |
+---------------------+
| 5.0.45-community-nt |
+---------------------+
1 row in set (0.05 sec)
代码如下:
Drop table if exists user;
Create table user(
Id int unsigned not null auto_increment,
Name varchar(20) not null,
Pwd char(32) not null,
Primary key(Id)
);
代码如下:
Delimiter //
Create procedure insertuser(in username varchar(20),in userpwd varchar(32))
Begin
Insert into welefen.user(Name,Pwd) values (username,md5(userpwd));
End
//
代码如下:
Delimiter //
Create procedure validateuser(in username varchar(20),out param1)
Begin
Select Pwd into param1 from welefen.user where Name=username;
End
//
代码如下:
Delimiter //
Create procedure modifyPwd(in username varchar(20),in userpwd varchar(32))
Begin
Update welefen.user set Pwd=md5(userpwd) where Name=username;
End
//
代码如下:
Delimiter //
Create procedure deleteuser(in username varchar(20))
Begin
delete from welefen.user where Name=username;
End
//
代码如下:
<?php
if (!mysql_connect("localhost","root","welefen")){
echo "连接数据库失败";
}
if (!mysql_select_db("welefen")){
echo "选择数据库表失败
";
}
$insert_user=array("welefen","welefen");//这里的welefen分别为用户名、密码
if (mysql_query("call insertuser('$insert_user[0]','$insert_user[1]')")){
echo "添加用户$insert_user[0]成功
";
}else {
echo "添加用户$insert_user[0]失败
";
}
$validate_user=array("welefen","welefen");//这里的welefen分别为用户名、密码
mysql_query("call validateuser('$validate_user[0]',@a)");
$Pwd=mysql_query("select @a");
$result=mysql_fetch_array($Pwd);
if ($result[0]==md5($validate_user[1])){
echo "用户$validate_user[0]验证正确
";
}else {
echo "用户$validate_user[0]验证错误
";
}
$modify_Pwd=array("welefen","weilefeng"); //welefen为用户名weilefeng为新密码
if (mysql_query("call modifyPwd('$modify_Pwd[0]','$modify_Pwd[1]')")){
echo "用户$modigy_Pwd[0]的密码修改成功
";
}else {
echo "用户$modigy_Pwd[0]的密码修改失败
";
}
$delete_user=array("welefen"); //welefen为用户名
if (mysql_query("call deleteuser('$delete_user[0]')")){
echo "用户$delete_user[0]删除成功
";
}else {
echo "用户$delete_user[0]删除失败
";
}
?>
希望本文所述对大家的php程序设计有所帮助。