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

MySQLµÄdatetimeÉèÖõ±Ç°Ê±¼äΪĬÈÏÖµ


MySQLµÄdatetimeÉèÖõ±Ç°Ê±¼äΪĬÈÏÖµ 
ÓÉÓÚMySQLĿǰ×ֶεÄĬÈÏÖµ²»Ö§³Öº¯Êý£¬ËùÒÔÓÃ
create_time datetime default now()
µÄÐÎʽÉèÖÃĬÈÏÖµÊDz»¿ÉÄܵġ£
´úÌæµÄ·½°¸ÊÇʹÓÃTIMESTAMPÀàÐÍ´úÌæDATETIMEÀàÐÍ¡£
CURRENT_TIMESTAMP £ºµ±ÎÒ¸üÐÂÕâÌõ¼Ç¼µÄʱºò£¬ÕâÌõ¼Ç¼µÄÕâ¸ö×ֶβ»»á¸Ä±ä
¡£
CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP £ºµ±ÎÒ¸üÐÂÕâÌõ¼Ç¼µÄʱºò£¬ÕâÌõ¼Ç¼µÄÕâ¸ö×ֶν«»á¸Ä±ä
¡£¼´Ê±¼ä±äΪÁ˸üÐÂʱºòµÄʱ¼ä¡££¨×¢ÒâÒ»¸öUPDATEÉèÖÃÒ»¸öÁÐΪËüÒѾ­ÓеÄÖµ£¬Õ⽫²»ÒýÆðTIMESTAMPÁб»¸üУ¬ÒòΪÈç¹ûÄãÉèÖÃÒ»¸öÁÐΪËüµ±Ç°µÄÖµ£¬MySQLΪÁËЧÂʶøºöÂÔ¸ü¸Ä¡££©Èç¹ûÓжà¸öTIMESTAMPÁУ¬Ö»ÓеÚÒ»¸ö×Ô¶¯¸üС£


Ïà¹ØÎĵµ£º

phpѧϰ±Ê¼Ç£¨11£©:MYSQLÔÚphp5ÖеÄÓ¦ÓÃ


1¡¢phpÓëmysql½¨Á¢Á¬½Ó
php.ini ¼ÓÔØmysql×é¼þ
extension=php_mysql.dllǰµÄ;È¥µô
exetension_dir=""·¾¶ÊÇ·ñÕýÈ·
PhpÁ¬½Ómysqlº¯Êý
mysql_connect:¿ªÆôMYSQLÁ¬½Ó
mysql_select_dir:´ò¿ªÒ»¸öÊý¾Ý¿â
@ºÍor die Òþ²Ø´íÎóºÍÌõ¼þÏÔʾ
mysql_connect("Ö÷»ú","Óû§Ãû","ÃÜÂë");  
mysql_sele ......

C#Á¬½ÓmysqlÊý¾Ý¿â

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using MySql ......

MySQLÓÅ»¯

µØÖ·£º http://imysql.cn/taxonomy/term/1?page=1
[InnoDBϵÁÐ] -- innodb±íÈçºÎ¸ü¿ìµÃµ½count(*)½á¹û£ºhttp://imysql.cn/2008_06_24_speedup_innodb_count
[InnoDBϵÁÐϵÁÐ] -- ´óÊý¾ÝÁ¿µÄµ¼³öµ¼Èë·½·¨±È½Ï£º
http://imysql.cn/2007_10_15_large_innodb_table_export_import
[MySQLÓÅ»¯°¸Àý]ϵÁÐ -- DISABLE/ENABLE K ......

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 ......

¾­µäµÄMYSQLÓï¾ä

·Ç³£³£Óõģº¾­µäµÄMYSQLÓï¾ä…… php¿ªÔ´
ÕâÕæÊÇÒ»¸öºÃ¶«Î÷£ºÑ§Ï°ºÃÁ˺ÜÊÜÓõÄŶ……
SQL·ÖÀࣺ
DDL—Êý¾Ý¶¨ÒåÓïÑÔ(Create£¬Alter£¬Drop£¬DECLARE)
DML—Êý¾Ý²Ù×ÝÓïÑÔ(Select£¬Delete£¬Update£¬Insert)
DCL—Êý¾Ý¿ØÖÆÓïÑÔ(GRANT£¬REVOKE£¬COMMIT£¬ROLLBACK)php¿ªÔ´
Ê×ÏÈ,¼òÒ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ