一个复杂的mysql查询语句(case,when,then,left join )
select `a`.`id` AS `id`,`a`.`UserName` AS `UserName`,
(case when (`a`.`sRegDate` = _utf8'1990-01-01 00:00:00.0') then _utf8'' else cast(date_format(`a`.`sRegDate`,_utf8'%Y-%m-%d %H:%i:%S') as char charset utf8) end) AS `sRegDate`,(case when (`a`.`feeendtime` = _utf8'1990-01-01 00:00:00.0') then _utf8'' else cast(date_format(`a`.`feeendtime`,_utf8'%Y-%m-%d %H:%i:%S') as char charset utf8) end) AS `feeendtime`,
(case when (`a`.`iStatus` = _utf8'0') then _utf8'正常' when (`a`.`iStatus` = _utf8'1') then _utf8'锁定' when (`a`.`iStatus` = _utf8'2') then _utf8'欠费' when (`a`.`iStatus` = _utf8'') then _utf8'申请停机' else _utf8'' end) AS `iStatus`,
(case when (`a`.`PayType` = _utf8'0') then _utf8'免费' when (`a`.`PayType` = _utf8'2') then _utf8'小区网用户' when (`a`.`PayType` = _utf8'10') then _utf8'外部用户' else _utf8'' end) AS `PayType`,
`c`.`UserType` AS `sDh1`,`b`.`FeeName` AS `iFeeType`,
(case when (`a`.`PauseStartTime` = _utf8'1990-01-01 00:00:00.0') then _utf8'' else cast(date_format(`a`.`PauseStartTime`,_utf8'%Y-%m-%d %H:%i:%S') as char charset utf8) end) AS `PauseStartTime`,
(case when (`a`.`PauseStopTime` = _utf8'1990-01-01 00:00:00.0') then _utf8'' else cast(date_format(`a`.`PauseStopTime`,_utf8'%Y-%m-%d %H:%i:%S') as char charset utf8) end) AS `PauseStopTime`,
(case when (`a`.`AcctStartTime` = _utf8'1990-01-01 00:00:00.0') then _utf8'' else cast(date_format(`a`.`AcctStartTime`,_utf8'%Y-%m-%d %H:%i:%S') as char charset utf8) end) AS `AcctStartTime`,
(case when (`a`.`AcctStopTime` = _utf8'1990-01-01 00:00:00.0') then _utf8'' else cast(date_format(`a`.`AcctStopTime`,_utf8'%Y-%m-%d %H:%i:%S') as char charset utf8) end) AS `AcctStopTime`,
`a`.`speed` AS `speed`,
(case when (`a`.`idtype` = _utf8'7') then _utf8'身份证' when (`a`.`idtype` = _utf8'1') then _utf8'教职工' when (`a`.`idtype` = _utf8'2') then _utf8'本科生' when (`a`.`idtype` = _utf8'3') then _utf8'研究生' when (`a`.`idtype` = _utf8'4') then _utf8'离退生' when (`a`.`idtype` = _utf8'5') then _utf8'
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给mysql开一个可以远程访问的用户命令如下:
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
"*.*" 表示数据库中所有的表,也可以换成指定的表如test.*
"myuser" 表示的是访问的用户名;
"%" 表示所有的主机即任何的主机都可以通过这个用户名访问我的数据库,也可以该成特定� ......
写入时，先做encode：
public static String encode(String src) {
String result = null;
try {
result = new String(src.getBytes("gbk"), "ISO-8859-1");
} catch (UnsupportedEncodingException uee) {
System.err.println(uee);
}
return result;
}
读出时，再做decode：
public static String deco ......
MySQL数据库备份和还原的常用命令
原文见http://www.21andy.com/blog/20071102/655.html
时间：2007-11-02 23:29:09 类别：技术 访问：3,731 views RSS 2.0 评论
备份MySQL数据库的命令
mysqldump -hhostname -uusername -ppassword database ......
