Mysql°²×°
windows주
½â¾ö°ì·¨£º
1.¼ì²éÄãµÄMysqlĿ¼ÓÐûÓиøÏµÍ³µÄSystemÓû§È¨ÏÞ¡£
2.ɾ³ýµôÄãµÄ %WINDOWS%/my.ini Îļþ¡£
3.¼ì²éÄãµÄ c:/my.cnf ÎļþÅäÖÃÊÇ·ñÕýÈ·¡£
ÐÞ¸Ä%windir%\my.ini£¬Ôö¼Ó
[mysqld]
#ÉèÖÃbasedirÖ¸ÏòmysqlµÄ°²×°Â·¾¶
basedir=D:\Program\Tools\mysql
datadir=D:\Program\Tools\mysql\data
ÒýÓà 9 Â¥ acmain_chm µÄ»Ø¸´:
¼ì²éÒ»ÏÂÄãµÄ C:\MySQL Datafiles Ŀ¼µÄȨÏÞÉèÖá£ÊÚ¸ø everyone FULLµÄȨÏÞÈ»ºóÔÙÊÔһϡ£
ÎÊÌâÎÒ½â¾öÁË£¬¾ÍÊǰÑÄã˵µÄÕâ¸öĿ¼ÎÒ×Ô¶¨ÒåÁËÒ»¸ö£¬ÔÚdÅÌÏÂÁË£¬½á¹ûºÜ˳ÀûµÄ¾Í°²×°ÉÏÁË£¬
ллÄã¡£
Ïà¹ØÎĵµ£º
Mysql·½Ê½£º
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class MysqlDB {
private String strClass = "com.mysql.jdbc.Driver";
private String strDriver = "jdbc:mysql://localhost: ......
1.ÏÂÔØ MySQL 6.0Ãâ°²×°°æ
http://www.mysql.com/downloads/mirror.php?id=386828
2.½« MySQL6.0 ½âѹµ½´ý°²×°Ä¿Â¼(×Ô¼º¾ö¶¨·Åµ½ÄÄ£©¡£½âѹºóĬÈÏÎļþ¼ÐÃû³ÆÎª£ºmysql£¨µ±È»¿ÉÒÔ×Ô¼º¸ü¸Ä£©£¬È»ºóÔÚ»·¾³±äÁ¿ÖÐÉèÖÃMYSQL_HOME£¨ÕâÑù£¬ÒÔºó¿ÉÒÔÓÃ%MYSQL_HOME%ÒýÓð²×°Ä¿Â¼£©¡£È磬ÎÒ·ÅÔÚEÅ̸ùĿ¼Ï£¬ËùÒÔ£¬MYSQL_HOMEÉèÖÃΪ ......
MySQLµÄ×Ö·û¼¯ÎÊÌâ¡£WindowsÏ¿Éͨ¹ýÐÞ¸Ämy.iniÄÚµÄ
CODE:
# CLIENT SECTION
[mysql]
default-character-set=utf8
#
SERVER SECTION
[mysqld]
default-character-set=utf8
Õâ
Á½¸ö×Ö¶ÎÀ´¸ü¸ÄÊý¾Ý¿â
µÄ
ĬÈÏ×Ö·û¼¯¡£µÚÒ»¸öÊǿͻ§¶ËĬÈϵÄ×Ö·û¼¯£¬µÚ¶þ¸öÊÇ·þÎñÆ÷¶ËĬÈϵÄ×Ö·û¼¯¡£¼ÙÉèÎÒÃǰÑÁ½¸ö¶¼ÉèΪutf8£¬È»ºó ......
ÎÒÓõÄÊÇmysql5.0£¬
ÎÒ³ÌÐòÖÐÓõ½ÁËÒ»¾äsqlÊÇ
SQL code
select count(DISTINCT id) from Policyinfo p where p.filename not in
(select p2.filename from Policyreadinfo p2 where p2.reader='test')
µ«ÊÇÿ´ÎÔÚ³ÌÐòÖÐÿ´ÎÖ´ÐÐÕâ¾äsqlÊ±ÍøÒ³¾ÍÌØÂý£¬Òª10¶àÃ룬¶øÕâ2¸ö±íµÄ¼Ç¼ÐÐÊýÒ²¾Í1000¶à¶øÒÑ£¬ÎÒ°ÑÕâ¾äsqlµ¥¶ÀÄ ......
ÔÚһЩÇé¿öÏ£¬MySQL¿ÉÒÔÖ±½ÓʹÓÃË÷ÒýÀ´Âú×ãÒ»¸ö ORDER BY »ò GROUP BY ×Ӿ䶸ÎÞÐè×ö¶îÍâµÄÅÅÐò¡£¾¡¹Ü ORDER BY ²»ÊǺÍË÷ÒýµÄ˳Ðò׼ȷƥÅ䣬Ë÷Òý»¹ÊÇ¿ÉÒÔ±»Óõ½£¬Ö»Òª²»ÓõÄË÷Òý²¿·ÖºÍËùÓеĶîÍâµÄ ORDER BY ×Ö¶ÎÔÚ WHERE ×Ó¾äÖж¼±»°üÀ¨ÁË¡£ ¡¡¡¡Ê¹ÓÃË÷ÒýµÄMySQL Order By ¡¡¡¡ÏÂÁеö²éѯ¶¼»áʹÓÃË÷ÒýÀ´½â¾ö ORDER BY ......