MySQL手册中有介绍。
通常我只是转储数据库并用一个新名称重新导入它。这不是非常大的数据库的一个选项。重命名数据库| SCHEMA} db_name TO new_db_name做坏事，只存在于少数版本中，总的来说是个坏主意。
这需要与InnoDB一起工作，InnoDB存储的东西与MyISAM非常不同。
当前回答
TodoInTx的解决方案和user757945的改编解决方案都不适合我的MySQL 5.5.16，所以这里是我的改编版本:
DELIMITER //
DROP PROCEDURE IF EXISTS `rename_database`;
CREATE PROCEDURE `rename_database` (IN `old_name` VARCHAR(20), IN `new_name` VARCHAR(20))
BEGIN
DECLARE `current_table_name` VARCHAR(20);
DECLARE `done` INT DEFAULT 0;
DECLARE `table_name_cursor` CURSOR FOR SELECT `table_name` FROM `information_schema`.`tables` WHERE (`table_schema` = `old_name`);
DECLARE CONTINUE HANDLER FOR NOT FOUND SET `done` = 1;
SET @sql_string = CONCAT('CREATE DATABASE IF NOT EXISTS `', `new_name` , '`;');
PREPARE `statement` FROM @sql_string;
EXECUTE `statement`;
DEALLOCATE PREPARE `statement`;
OPEN `table_name_cursor`;
REPEAT
FETCH `table_name_cursor` INTO `current_table_name`;
IF NOT `done` THEN
SET @sql_string = CONCAT('RENAME TABLE `', `old_name`, '`.`', `current_table_name`, '` TO `', `new_name`, '`.`', `current_table_name`, '`;');
PREPARE `statement` FROM @sql_string;
EXECUTE `statement`;
DEALLOCATE PREPARE `statement`;
END IF;
UNTIL `done` END REPEAT;
CLOSE `table_name_cursor`;
SET @sql_string = CONCAT('DROP DATABASE `', `old_name`, '`;');
PREPARE `statement` FROM @sql_string;
EXECUTE `statement`;
DEALLOCATE PREPARE `statement`;
END//
DELIMITER ;
希望它能帮助到像我这样处境的人!注意:@sql_string之后将在会话中逗留。不使用它，我就无法写出这个函数。
其他回答
这适用于所有数据库，通过使用maatkit mysql工具包重命名每个表
使用mk-find打印并重命名每个表。手册页有更多选项和示例
mk-find --dblike OLD_DATABASE --print --exec "RENAME TABLE %D.%N TO NEW_DATABASE.%N"
如果您安装了maatkit(这非常简单)，那么这是最简单的方法。
这是我写的一个批处理文件，从命令行自动化，但它适用于Windows/MS-DOS。
语法:rename_mysqldb database newdatabase -u [user] -p[password]
:: ***************************************************************************
:: FILE: RENAME_MYSQLDB.BAT
:: ***************************************************************************
:: DESCRIPTION
:: This is a Windows /MS-DOS batch file that automates renaming a MySQL database
:: by using MySQLDump, MySQLAdmin, and MySQL to perform the required tasks.
:: The MySQL\bin folder needs to be in your environment path or the working directory.
::
:: WARNING: The script will delete the original database, but only if it successfully
:: created the new copy. However, read the disclaimer below before using.
::
:: DISCLAIMER
:: This script is provided without any express or implied warranties whatsoever.
:: The user must assume the risk of using the script.
::
:: You are free to use, modify, and distribute this script without exception.
:: ***************************************************************************
:INITIALIZE
@ECHO OFF
IF [%2]==[] GOTO HELP
IF [%3]==[] (SET RDB_ARGS=--user=root) ELSE (SET RDB_ARGS=%3 %4 %5 %6 %7 %8 %9)
SET RDB_OLDDB=%1
SET RDB_NEWDB=%2
SET RDB_DUMPFILE=%RDB_OLDDB%_dump.sql
GOTO START
:START
SET RDB_STEP=1
ECHO Dumping "%RDB_OLDDB%"...
mysqldump %RDB_ARGS% %RDB_OLDDB% > %RDB_DUMPFILE%
IF %ERRORLEVEL% NEQ 0 GOTO ERROR_ABORT
SET RDB_STEP=2
ECHO Creating database "%RDB_NEWDB%"...
mysqladmin %RDB_ARGS% create %RDB_NEWDB%
IF %ERRORLEVEL% NEQ 0 GOTO ERROR_ABORT
SET RDB_STEP=3
ECHO Loading dump into "%RDB_NEWDB%"...
mysql %RDB_ARGS% %RDB_NEWDB% < %RDB_DUMPFILE%
IF %ERRORLEVEL% NEQ 0 GOTO ERROR_ABORT
SET RDB_STEP=4
ECHO Dropping database "%RDB_OLDDB%"...
mysqladmin %RDB_ARGS% drop %RDB_OLDDB% --force
IF %ERRORLEVEL% NEQ 0 GOTO ERROR_ABORT
SET RDB_STEP=5
ECHO Deleting dump...
DEL %RDB_DUMPFILE%
IF %ERRORLEVEL% NEQ 0 GOTO ERROR_ABORT
ECHO Renamed database "%RDB_OLDDB%" to "%RDB_NEWDB%".
GOTO END
:ERROR_ABORT
IF %RDB_STEP% GEQ 3 mysqladmin %RDB_ARGS% drop %NEWDB% --force
IF %RDB_STEP% GEQ 1 IF EXIST %RDB_DUMPFILE% DEL %RDB_DUMPFILE%
ECHO Unable to rename database "%RDB_OLDDB%" to "%RDB_NEWDB%".
GOTO END
:HELP
ECHO Renames a MySQL database.
ECHO Usage: %0 database new_database [OPTIONS]
ECHO Options: Any valid options shared by MySQL, MySQLAdmin and MySQLDump.
ECHO --user=root is used if no options are specified.
GOTO END
:END
SET RDB_OLDDB=
SET RDB_NEWDB=
SET RDB_ARGS=
SET RDB_DUMP=
SET RDB_STEP=
TodoInTx的解决方案和user757945的改编解决方案都不适合我的MySQL 5.5.16，所以这里是我的改编版本:
DELIMITER //
DROP PROCEDURE IF EXISTS `rename_database`;
CREATE PROCEDURE `rename_database` (IN `old_name` VARCHAR(20), IN `new_name` VARCHAR(20))
BEGIN
DECLARE `current_table_name` VARCHAR(20);
DECLARE `done` INT DEFAULT 0;
DECLARE `table_name_cursor` CURSOR FOR SELECT `table_name` FROM `information_schema`.`tables` WHERE (`table_schema` = `old_name`);
DECLARE CONTINUE HANDLER FOR NOT FOUND SET `done` = 1;
SET @sql_string = CONCAT('CREATE DATABASE IF NOT EXISTS `', `new_name` , '`;');
PREPARE `statement` FROM @sql_string;
EXECUTE `statement`;
DEALLOCATE PREPARE `statement`;
OPEN `table_name_cursor`;
REPEAT
FETCH `table_name_cursor` INTO `current_table_name`;
IF NOT `done` THEN
SET @sql_string = CONCAT('RENAME TABLE `', `old_name`, '`.`', `current_table_name`, '` TO `', `new_name`, '`.`', `current_table_name`, '`;');
PREPARE `statement` FROM @sql_string;
EXECUTE `statement`;
DEALLOCATE PREPARE `statement`;
END IF;
UNTIL `done` END REPEAT;
CLOSE `table_name_cursor`;
SET @sql_string = CONCAT('DROP DATABASE `', `old_name`, '`;');
PREPARE `statement` FROM @sql_string;
EXECUTE `statement`;
DEALLOCATE PREPARE `statement`;
END//
DELIMITER ;
希望它能帮助到像我这样处境的人!注意:@sql_string之后将在会话中逗留。不使用它，我就无法写出这个函数。
使用以下几个简单的命令:
mysqldump -u username -p -v olddatabase > olddbdump.sql
mysqladmin -u username -p create newdatabase
mysql -u username -p newdatabase < olddbdump.sql
或者使用@Pablo Marin-Garcia建议的以下方法来减少I/O:
mysqladmin -u username -p create newdatabase
mysqldump -u username -v olddatabase -p | mysql -u username -p -D newdatabase
实际上，最简单的答案是导出旧数据库，然后将其导入到您创建的新数据库中以替换旧数据库。当然，您应该使用phpMyAdmin或命令行来做到这一点。
重命名和操纵数据库是一个坏主意!不要这样做。(除非你是那种“黑客类型”的人，在黑暗中坐在妈妈的地下室里，吃着披萨，白天睡觉。)
你最终会遇到比你想要的更多的问题和工作。
So,
Create a new_database and name it the correct way. Go to your phpMyAdmin and open the database you want to export. Export it (check the options, but you should be OK with the defaults. You will get a file like or similar to this. The extension on this file is .sql -- phpMyAdmin SQL Dump -- version 3.2.4 -- http://www.phpmyadmin.net -- Host: localhost -- Generation Time: Jun 30, 2010 at 12:17 PM -- Server version: 5.0.90 -- PHP Version: 5.2.6 SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO"; /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT /; /!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS /; /!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION /; /!40101 SET NAMES utf8 */; -- -- Database: mydatab_online -- -- Table structure for table user CREATE TABLE IF NOT EXISTS user ( timestamp int(15) NOT NULL default '0', ip varchar(40) NOT NULL default '', file varchar(100) NOT NULL default '', PRIMARY KEY (timestamp), KEY ip (ip), KEY file (file) ) ENGINE=MyISAM DEFAULT CHARSET=latin1; -- -- Dumping data for table user INSERT INTO user (timestamp, ip, file) VALUES (1277911052, '999.236.177.116', ''), (1277911194, '999.236.177.116', '');
这将是您的.sql文件。你刚刚导出的那个。
在你的硬盘上找到它;通常在/temp中。选择具有正确名称(阅读本文的原因)的空数据库。 说:导入-开始
通过将程序输入到通常是configuration.php文件中，将程序连接到正确的数据库。刷新服务器(两个。为什么?因为我是UNIX老手，我说过。 现在，你的状态应该很好。如果你还有任何问题，请到网上来找我。
