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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');
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MySQL Cluster Core Concepts


NDBCLUSTER
(also known as NDB
) is an in-memory
storage engine offering high-availability and data-persistence
features.

The NDBCLUSTER
storage engine can be
configured with a range of failover and load-balancing options,
but it is easiest t ......

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 ......

MysqlµÄDBHelper.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using MySql.Data.MySqlClient;
namespace i_salesDAL
{
public class DBHelper
{
//Òýµ¼Êý¾Ý¿âÁ¬½ÓÊý¾Ý¿âµ÷ÓÃWeb.ConfigÎļþ
private static MySqlConnection connection;
//´´½¨ ......

MysqlÊý¾Ý¿âµ¼³ö·½·¨

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--add-drop-table ÔÚÿ¸öcreateÓï¾ä֮ǰÔö¼ÓÒ»¸ödrop
--skip-opt ÿÌõ¼Ç¼ֻ¶ÔÓ¦Ò»¸öinsertÓï¾ä ......

MySQL ÖÐÎÄÏÔʾÂÒÂë

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²»Í¬µÄ±àÂë¸ñʽ»áµ¼ÖÂͬһ×Ö· ......
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