Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

ÓÃMySQL Éú³ÉËæ»úÃÜÂë

ÍíÉÏÓÐÅóÓÑÎÊÆð£¬¼òµ¥µÄдÁËÒ»¸ö¡£
DELIMITER $$
CREATE
    FUNCTION `t_girl`
.
`func_rand_string`
(
f_num tinyint
unsigned
,
f_type tinyint
unsigned
)
    RETURNS varchar
(
32)
    BEGIN
      -- Translate the number to letter.
      -- No 1 stands for string only.
      -- No 2 stands for number only.
      -- No 3 stands for combination of the above.
      declare i int
unsigned
default
0;
      declare v_result varchar
(
255)
default
''
;
      while i <
f_num do
        if f_type =
1 then
          set
v_result =
concat
(
v_result,
char
(
97+
ceil(
rand
(
)
*
25)
)
)
;
        elseif f_type=
2 then
          set
v_result =
concat
(
v_result,
char
(
48+
ceil(
rand
(
)
*
9)
)
)
;
        elseif f_type=
3 then
          set
v_result =
concat
(
v_result,
substring
(
replace
(
uuid
(
)
,
'-'
,
''
)
,
i+
1,
1)
)
;
        end
if;
        set
i =
i +
1;
      end
while;

      return v_result;
    END
$
$
DELIMITER ;
µ÷Ó÷½·¨Ê¾Àý£º
select func_rand_string(12,3);


Ïà¹ØÎĵµ£º

Mysql ½»²æ²éѯ

CREATE TABLE `taa` (
   `year` varchar(4) DEFAULT NULL,
   `month` varchar(2) DEFAULT NULL,
   `amount` double DEFAULT NULL
 ) ENGINE=InnoDB DEFAULT CHARSET=utf
"year","m ......

Mysql for linux mysql×Ô¶¯±¸·Ý½Å±¾

¿ÉÒÔ½«Õâ¸ö½Å±¾·Å½øcrontab£¬ËûµÄÅäÖÆÎļþÔÚ /etc/crontabÖÐÿÌìÁ賿ִÐÐÒ»´Î£¬×Ô¶¯±¸·Ý Õâ¸ö½Å±¾Ã¿Ìì×î¶àÖ»Ö´ÐÐÒ»´Î£¬¶øÇÒÖ»±£Áô×î½üÎåÌìµÄ±¸·ÝÔÚ·þÎñÆ÷ÉÏ¡£
#!/bin/bash
#This is a ShellScript For Auto DB Backup
#Powered by aspbiz
#2004-09
#Setting
#ÉèÖÃÊý¾Ý¿âÃû£¬Êý¾Ý¿âµÇ¼Ãû£¬ÃÜÂ룬±¸·Ý·¾¶£¬ÈÕ־ ......

¼Ç¼µã¶«Î÷£¬MSSQL£¬MySQL£¬.NETµÄMD5¼ÓÃÜ

 MSSQL:select Right(sys.fn_VarBinToHexStr(hashbytes('MD5', '123456')),32)
 MSSQL16λ:select Right(sys.fn_VarBinToHexStr(hashbytes('MD5', '123456')),16)
 MySQL:select md5('123456')
 .NET:string ½á¹û×Ö·û´®=System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFil ......

MySQLѧϰ

»ù±¾µÄMySQLÓï¾äºÜ¼òµ¥£¬ÕâÀïÖ÷Ҫ̸̸һЩÈÝÒ×ÒÅÍüµÄ¡£
1.ÈçºÎÉèÖÃ×ֶεÝÔö
create table tb_User(Id int auto_increment
not null primary key,UserName varchar(50),Password varchar(20));
2.²é¿´±í½á¹¹
desc tb_User;
3.ÈçºÎÐ޸ıí½á
ÖØÃüÃû±í£ºalter table tb_User rename
tb_UserInfo;
Ìí¼ÓÒ»ÁУºalter ta ......

ÐÞ¸ÄMySQLĬÈÏÃÜÂëµÄ¾ßÌå²½Ö裨ת£©

access denied for user 'root'@'localhost' (using password: YES);
½ñÌìÓÃmysqlµÄʱºò£¬µÇ¼µÄʱºò³öÏÖÁËÕâ¾ä£¬²»ÖªµÀÊÇʲôÒâ˼£¬ÒòΪÎÒµÄmysqlÊÇ×°centosµÄʱºòÒ»Æð×°µÄ£¬ÃÜÂëÎÒ¾ÍÊäÈëÎÒµÄÕÊ»§ÃÜÂ룬½á¹û³öÏÖÁËÉÏÃæÄǾ䣻°Ù¶ÈÁËһϣ¬»¹Õæ²»ÉÙÈ˳öÏÖÁËÕâ¸öÎÊÌâ¡£¡£×îºóÎÒÕÒµ½ÁË·½·¨£»
[root@localhost home]# mysql - ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ