MySqlÊý¾Ý¿â°æ±¾²éѯ
MySql°æ±¾ÐÅÏ¢µÄ²éѯ£º
1¡¢Í¨¹ýmysql -VÃüÁî²éѯ
C:\mysql\bin>mysql -V
mysql Ver 12.22 Distrib 4.0.18, for Win95/Win98 (i32)
2¡¢Í¨¹ýmysqlģʽϵÄstatusÃüÁî²é¿´×´Ì¬
mysql> status
--------------
mysql Ver 12.22 Distrib 4.0.18, for Win95/Win98 (i32)
Connection id: 14933
Current database: mysql
Current user: root@localhost
SSL: Not in use
Server version: 4.0.18-nt
Protocol version: 10
Connection: localhost via TCP/IP
Client characterset: latin1
Server characterset: latin1
TCP port: 3306
Uptime: 19 hours 24 min 41 sec
Threads: 2 Questions: 37443 Slow queries: 0 Opens: 355 Flush tables: 1 Open
tables: 9 Queries per second avg: 0.536
--------------
mysql>
3¡¢Í¨¹ýmysqlģʽϵÄselectÓï¾ä²éѯ
mysql> select version();
+-----------+
| version() |
+-----------+
| 4.0.18-nt |
+-----------+
1 row in set (0.00 sec)
mysql>
4¡¢Í¨¹ýmysql --helpÃüÁî½øÐв鿴
C:\mysql\bin>mysql --help
mysql Ver 12.22 Distrib 4.0.18, for Win95/Win98 (i32)
Copyright (C) 2002 MySQL AB
......
תÌû£ºhttp://www.hackbase.com/tech/2009-06-25/53429.html
Ïà¹ØÎĵµ£º
#!/bin/bash
#ɾ³ý100¸öÊý¾Ý¿âÖеÄ1000¸ö±íµÄ¹ýÆÚÊý¾Ý
DBHOST="127.0.0.1"
DBPWD="pwd"
DBUSER="root"
MYSQLBIN="/usr/local/mysql/bin/mysql"
for((dbindex = 0;dbindex < 100;dbindex++))
do
for((tabindex = 0;tabindex < 10;tabindex++))
do
if [&n ......
1¡¢±à¼MySQL(ºÍPHP´îÅäÖ®×î¼Ñ×éºÏ)ÅäÖÃÎļþ£º
windows»·¾³ÖУº%MySQL(ºÍPHP´îÅäÖ®×î¼Ñ×éºÏ)_installdir%\my.ini¡¡//Ò»°ãÔÚMySQL(ºÍPHP´îÅäÖ®×î¼Ñ×éºÏ)°²×°Ä¿Â¼ÏÂÓÐmy.ini¼´MySQL(ºÍPHP´îÅäÖ®×î¼Ñ×éºÏ)µÄÅäÖÃÎļþ¡£
linux»·¾³ÖУº/etc/my.cnf
ÔÚ[MySQL(ºÍPHP´îÅäÖ®×î¼Ñ×éºÏ)d]ÅäÖöÎÌí¼ÓÈçÏÂÒ»ÐУº
skip-grant-tables
......
1£º ASCII(str) ¡¡·µ»Ø×Ö·û´®strµÄµÚÒ»¸ö×Ö·ûµÄASCIIÖµ(strÊǿմ®Ê±·µ»Ø0) mysql> select ASCII('2'); ¡¡¡¡-> 50 mysql> select ASCII(2); ¡¡¡¡-> 50 mysql> select ASCII('dete'); ¡¡¡¡-> 100
2£ºORD(str) ¡¡Èç¹û×Ö·û´®str¾äÊ×Êǵ¥×Ö½Ú·µ»ØÓëASCII()º¯Êý·µ»ØµÄÏàֵͬ¡£¡¡Èç¹ûÊÇÒ»¸ö¶à×Ö½Ú×Ö·û,ÒÔ¸ñʽ·µ ......
MYSQL4.1¼°¸ü¸ß°æ±¾Ö§³Ö·þÎñÆ÷¶Ë×¼±¸Óï¾ä(Prepared Statements), ËüʹÓÃÔöÇ¿µÄ¶þ½øÖƿͻ§¶Ë/·þÎñÆ÷ÐÒéÔÚ¿Í»§¶ËºÍ·þÎñÆ÷Ö®¼ä¸ßЧµÄ·¢ËÍÊý¾Ý£¬¿ÉÒÔͨ¹ýÖ§³ÖÕâÖÖÐÐÐÒéµÄ±à³Ì¿âÀ´·ÃÎÊ×¼±¸Óï¾ä£¬ÁÐÈëMYSQL CAPI,MYSQL Connector/JºÍMYSQL Connector/NET ΪJAVAºÍ.NETÌṩÁËͬÑùµÄ·ÃÎʽӿڡ£ËüÒ²ÓÐSQLÓïÑԵķÃÎʽӿڡ£
´´½¨×¼ ......
¸ù¾ÝÄãµÄʹÓÃÄ¿µÄÎÒ¾õµÃÕâ¸öº¯ÊýÓÐÁ½·½ÃæµÄÓÃ;£º
·ÀÖ¹SQL Injection¹¥»÷£¬Ò²¾ÍÊÇÄã±ØÐëÑéÖ¤Óû§µÄÊäÈë
²Ù×÷Êý¾ÝµÄʱºò±ÜÃâ²»±ØÒªµÄ×Ö·ûµ¼Ö´íÎó
mysql_real_escape_string() º¯ÊýתÒå SQL Óï¾äÖÐʹÓõÄ×Ö·û´®ÖеÄÌØÊâ×Ö·û¡£
ÏÂÁÐ×Ö·ûÊÜÓ°Ï죺
\x00
\n
\r
\
'
"
\x1a
Èç¹û³É¹¦£¬Ôò¸Ãº¯Êý·µ»Ø±»×ªÒåµÄ×Ö·û´ ......