mysql 安装包
MySQL-client-community-5.0.41-0.rhel4.i386.rpm # 客户端
MySQL-devel-community-5.0.82-0.rhel4.i386.rpm #开发时要用的头文件和C文件
MySQL-server-community-5.0.41-0.rhel4.i386.rpm #服务端
MySQL-shared-community-5.0.82-0.rhel4.i386.rpm #一些库文件
perl-DBD-MySQL-2.9004-3.1.i386.rpm
perl-DBI-1.40-5.i386.rpm
相关文档：
添加字段的格式
ALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name alter_specification [, alter_specification] ...alter_specification: table_option ... | ADD [COLUMN] col_name column_definition [FIRST | AFTER col_name ]
eg.
ALTER TABLE myTbl ADD COLUMN newItem VARCHAR(20) DEFAULT "0" ......
mysql> select * from tx;
+------+
| id |
+------+
| 4 |
| 7 |
| 3 |
| 9 |
| 5 |
+------+
5 rows in set (0.05 sec)
mysql> delete a from tx a inner join (select * from tx limit 2,2) b ......
解决hibernate+mysql出现的隔天连接超时问题
出现错误：SQL Error: 0, SQLState: 08S01
Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.net.SocketException
MESSAGE: Software caused connection abort: socket write error
STACKTRACE:
java.net.SocketExcepti ......
一般在MYSQL使用中文查询
都是用 set NAMES character
character_set_client ，这是用户告诉MySQL查询是用的什么字符集。
character_set_connection ，MySQL接受到用户查询后，按照character_set_client将其转化为character_set_connection设定的字符集。
character_set_results ， MySQL将存储的数据转换成charact ......
