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

Mysql limitÓ÷¨

1.SELECT
 
*
 
from
 
table
 LIMIT
1
,
20
;  
//
 ¼ìË÷¼Ç¼ÐÐ
2-21
   µÚÒ»¸ö²ÎÊý£º²éѯÆðʼÐУ¨´Ó0¿ªÊ¼£©
   µÚ¶þ¸ö²ÎÊý£º²éѯ¼¸Ìõ¼Ç¼
2.
SELECT
 
*
 
from
 
table
 LIMIT
5
,
-
1

//
 ¼ìË÷¼Ç¼ÐÐ
6
-
last.
3.
SELECT
 
*
 
from
 
table
 LIMIT 
5
;     
//
¼ìË÷ǰ 
5
 ¸ö¼Ç¼ÐÐ


Ïà¹ØÎĵµ£º

MySQL 5.1.42 ·¢²¼

MySQL 5.1 ÊÇ MySQL Êý¾Ý¿âĿǰ·¢²¼µÄ×îеÄÎȶ¨°æ±¾£¨5.5ÊÇbeta״̬£¬6.0ÊÇalpha״̬£©¡£
¸Ã°æ±¾Ôö¼ÓÁ˶ÔÏÂÃæ¼¸¸öƽ̨µÄÖ§³Ö£º
Mac OS X 10.6 x86/x64
HP-UX 11.31 IA64
SLES 11 x86/x64
InnoDB ²å¼þÉý¼¶µ½ 1.0.6 °æ±¾£¬ÁíÍâͨ¹ý¶Ô²éѯ»º´æµÄË鯬ÓÅ»¯ÌáÉýÁËÐÔÄÜ£¬¸ü¶àÏêϸµÄÄÚÈÝÇë¿´ÕâÀï¡£
ÏÂÔØµØÖ·£ºhttp://dev. ......

linux mysqlÅäÖÃ


Ð¶ÔØmysql
1¡¢²éÕÒÒÔǰÊÇ·ñ×°ÓÐmysql
ÃüÁrpm -qa|grep -i mysql
¿ÉÒÔ¿´µ½mysqlµÄÁ½¸ö°ü£º
mysql-4.1.12-3.RHEL4.1
mysqlclient10-3.23.58-4.RHEL4.1
2¡¢É¾³ýmysql
ɾ³ýÃüÁrpm -e --nodeps °üÃû
( rpm -ev mysql-4.1.12-3.RHEL4.1 )
3¡¢É¾³ýÀϰ汾mysqlµÄ¿ª·¢Í·ÎļþºÍ¿â
ÃüÁrm -fr /usr/lib/mysql
r ......

Java °ÑÎı¾ÖеÄÊý¾Ý²åÈëµ½MySqlÊý¾Ý¿â

Ò»¹²ÓÐÈý¸öÀࣺWriteFile ; ReadFile ; InsertDB ;
//WriteFile.java
//ÓÃÓÚ½«ÐÅϢдÈëÎı¾Îļþ
package org.mb.insertfromfile;
import java.io.*;
public class WriteFile{
private int count = 0 ;
public int getCount() {
return count;
}
public void setCount(int count) {
this.cou ......

mysqlÊý¾Ý¿â·¶Ê½Ïê½â

ÔÚÉè¼Æ¹ØÏµÊý¾Ý¿âʱÊÇÒª×ñÊØÒ»¶¨µÄ¹æÔòµÄ¡£ÓÈÆäÊÇÊý¾Ý¿âÉè¼Æ·¶Ê½ÏÖ¼òµ¥½éÉÜ1NF£¨µÚÒ»·¶Ê½£©£¬2NF£¨µÚ¶þ·¶Ê½£©£¬3NF£¨µÚÈý·¶Ê½£©ºÍBCNF£¬ÁíÓеÚËÄ·¶Ê½ºÍµÚÎ巶ʽÁôµ½ÒÔºóÔÙ½éÉÜ¡£ÔÚÄãÉè¼ÆÊý¾Ý¿â֮ʱ£¬ÈôÄÜ·ûºÏÕ⼸¸ö·¶Ê½£¬Äã¾ÍÊÇÊý¾Ý¿âÉè¼ÆµÄ¸ßÊÖ¡£
µÚÒ»·¶Ê½£¨1NF£©£ºÔÚ¹ØÏµÄ£Ê½RÖеÄÿһ¸ö¾ßÌå¹ØÏµrÖУ¬Èç¹ûÿ¸öÊôÐÔÖµ¶¼Ê ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ