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

mysql ÖеÄ×Ö·û´®Á¬½Ó CONCAT(str1,str2,...)

·µ»ØÀ´×ÔÓÚ²ÎÊýÁ¬½áµÄ×Ö·û´®¡£Èç¹ûÈκβÎÊýÊÇNULL£¬·µ»ØNULL¡£¿ÉÒÔÓг¬¹ý2¸öµÄ²ÎÊý¡£Ò»¸öÊý×Ö²ÎÊý±»±ä»»ÎªµÈ¼ÛµÄ×Ö·û´®ÐÎʽ¡£
mysql> select CONCAT('My', 'S', 'QL');
-> 'MySQL'
mysql> select CONCAT('My', NULL, 'QL');
-> NULL
mysql> select CONCAT(14.3);
-> '14.3'
È磺update test set ID=concat(ID,'ABC');
·ÅÔÚÇ°Ãæ¾ÍÁ¬½Óµ½Ç°Ã棬·ÅÔÚºóÃæ¾ÍÁ¬½ÓÔÚºóÃæ¡£


Ïà¹ØÎĵµ£º

MySQL Cluster Multi Computer How To


This section is a “How-To
” that describes the basics
for how to plan, install, configure, and run a MySQL Cluster.
Whereas the examples in
Chapter 3, MySQL Cluster Configuration
provide more in-depth
information on a variety of clustering options and co ......

MySQL´´Ê¼ÈË·¢ÓʼþÑ°ÇóÖйú°ïÖú


½ñÔçÊÕµ½ÁËMySQLµÄÓʼþ£¬È«ÎÄÈçÏ£º
Ç×°®µÄÕü¾ÈMySQLµÄÖйúÇ©ÃûÖ§³ÖÕߣ¬
Å·ÃË¿ÉÄÜÎÞ·¨Õü¾ÈMySQL,ÖйúºÍ¶íÂÞ˹¿ÉÄÜÊÇÕü¾ÈMySQLµÄÏ£ÍûÖ®ËùÔÚ¡£ÖйúÓµÓÐÇ¿´ó¡¢¶ÀÁ¢ÒÔ¼°×ÔÐŵķ´Â¢¶ÏÖ÷¹Ü»ú¹Ø£¬Òò´Ë£¬ÎÒ±¾ÈËÔÚ´ËÇëÇóÄúµÄ°ïÖú¡£¶ÔÓÚÄúÔÚhttp://www.helpmysql.org/ru/petitionµÄÇ©Ãû£¬ÎÒÃÇÉî±í¸Ðл¡£Èç¹û¿ÉÒԵĻ°£¬ÎÒÃÇÐèÒªÄúµ ......

excelÊý¾ÝÅúÁ¿µ¼Èëµ½MysqlÊý¾Ý¿â

aspxÒ³Ãæ
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="customin.aspx.cs" Inherits="kf_customin" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" ......

MysqlÊý¾Ý¿âµ¼³ö·½·¨

µ¼³öÕû¸öÊý¾Ý¿â£ºmysqldump -uÓû§Ãû -pÃÜÂë ÐèÒªµ¼³öµÄÊý¾Ý¿âÃû > µ¼³öÎļþÃû.sql
ÆäËû²ÎÊý£º
-d ²»°üº¬Êý¾Ý£¬Ö»ÓÐÊý¾Ý¿â±í½á¹¹
--add-drop-table ÔÚÿ¸öcreateÓï¾ä֮ǰÔö¼ÓÒ»¸ödrop
--skip-opt ÿÌõ¼Ç¼ֻ¶ÔÓ¦Ò»¸öinsertÓï¾ä ......

MySQL Cluster Configuration — Basic Example


To support MySQL Cluster, you will need to update
my.cnf
as shown in the following example.
You may also specify these parameters on the command line when
invoking the executables.

Note
The options shown here should not be confused with thos ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ