Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

Mysql°²×°

windows주
½â¾ö°ì·¨£º
1.¼ì²éÄãµÄMysqlĿ¼ÓÐûÓиøϵͳµÄSystemÓû§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£¬¾ÍÊÇ°ÑÄã˵µÄÕâ¸öĿ¼ÎÒ×Ô¶¨ÒåÁËÒ»¸ö£¬ÔÚdÅÌÏÂÁË£¬½á¹ûºÜ˳ÀûµÄ¾Í°²×°ÉÏÁË£¬
ллÄã¡£


Ïà¹ØÎĵµ£º

oracleºÍMysqlÁ¬½ÓÊý¾Ý¿â

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: ......

mysqlµÄcardinalityÔÚmyisamºÍinnodbÖеIJ»Í¬

Ïêϸ½âÊͺÍÀý×Ó¼ûÏÂÁÐÎÄÕ£º
http://www.mysqlperformanceblog.com/2008/09/03/analyze-myisam-vs-innodb/
http://www.penglixun.com/work/database/mysql_show_index_cardinality.html
£¨1£©cardinalityÓ°Ïìmysql optimizer¶ÔË÷ÒýµÄÑ¡È¡
£¨2£©¿ÉÒÔͨ¹ýshow index from table_nameÀ´²é¿´±íµÄË÷ÒýºÍcardinality
£¨3£©in ......

MysqlÖ¸Á showÓ÷¨

MySQL showµÄÓ÷¨
   
a. show tables»òshow tables from database_name; // ÏÔʾµ±Ç°Êý¾Ý¿âÖÐËùÓбíµÄÃû³Æ
   b. show databases; // ÏÔʾmysqlÖÐËùÓÐÊý¾Ý¿âµÄÃû³Æ
   c. show columns from table_name from database_name; »òshow columns from database_name.table_name;  ......

MySQL Order ByË÷ÒýÓÅ»¯

ÔÚһЩÇé¿öÏ£¬MySQL¿ÉÒÔÖ±½ÓʹÓÃË÷ÒýÀ´Âú×ãÒ»¸ö ORDER BY »ò GROUP BY ×Ó¾ä¶øÎÞÐè×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 ¡¡¡¡ÏÂÁеļ¸¸ö²éѯ¶¼»áʹÓÃË÷ÒýÀ´½â¾ö ORDER BY ......

Á˽âMySQLÊý¾Ý¿âËø¶¨»úÖÆ

Èç¹ûÒªÁ˽âMySQLÊý¾Ý¿âËø¶¨»úÖÆ£¬Ê×ÏÈÁ˽âÒ»ÏÂMySQLµÄÈýÖÖËø¶¨ÀàÐÍ£º
Ò»£¬Ðм¶Ëø¶¨
¶þ£¬±í¼¶Ëø¶¨
Èý£¬Ò³¼¶Ëø¶¨
ÕâÈýÖÖËø¶¨ÀàÐÍ£¬ÔÚMySQLÊý¾Ý¿âÖÐʹÓÃÈçÏ£º
Ðм¶Ëø¶¨£ºMyISAM£¬Memory£¬CSV[·ÇÊÂÎñÐԵĴ洢ÒýÇæ]
±í¼¶Ëø¶¨£ºInnoDB£¬NDB Chuster
Ò³¼¶Ëø¶¨£ºBerkeley DB
Á½ÖÖËø¶¨»úÖÆ£º¶ÁËø¶¨ºÍдËø¶¨
MySQLÊý¾Ý¿âËø¶ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ