最简单的，打开MYSQL >>选择数据库的名称，你想改变>>点击“操作”，然后把新名称在“重命名数据库:”字段，然后点击“Go”按钮

简单!

有两种方法。

重命名表old_db。table_name TO new_db.table_name; Goto操作->在那里你可以看到表选项卡。你可以在这里编辑表名。

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。

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=

如果你使用的是phpMyAdmin，那么你只需要到xamp中的mysql文件夹，关闭phpMyAdmin，然后重命名你看到的文件夹作为你的数据库名，然后重新启动你的phpMyAdmin。可以看到数据库重命名了。

下面是一行Bash代码片段，用于将所有表从一个模式移动到另一个模式:

history -d $((HISTCMD-1)) && mysql -udb_user -p'db_password' -Dold_schema -ABNnqre'SHOW TABLES;' | sed -e's/.*/RENAME TABLE old_schema.`&` TO new_schema.`&`;/' | mysql -udb_user -p'db_password' -Dnew_schema

开始时的history命令只是确保包含密码的MySQL命令不会保存到shell历史记录中。

确保db_user对旧模式具有读/写/删除权限，对新模式具有读/写/创建权限。