在phpmyadmin中，您可以轻松地重命名数据库

select database 

  goto operations tab

  in that rename Database to :

  type your new database name and click go

要求删除旧表和重新加载表数据单击确定

数据库被重命名

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。

可以将一个数据库中的所有表重命名为另一个数据库下的所有表，而不必执行完整的转储和恢复。

DROP PROCEDURE IF EXISTS mysql.rename_db;
DELIMITER ||
CREATE PROCEDURE mysql.rename_db(IN old_db VARCHAR(100), IN new_db VARCHAR(100))
BEGIN
SELECT CONCAT('CREATE DATABASE ', new_db, ';') `# create new database`;
SELECT CONCAT('RENAME TABLE `', old_db, '`.`', table_name, '` TO `', new_db, '`.`', table_name, '`;') `# alter table` FROM information_schema.tables WHERE table_schema = old_db;
SELECT CONCAT('DROP DATABASE `', old_db, '`;') `# drop old database`;
END||
DELIMITER ;

$ time mysql -uroot -e "call mysql.rename_db('db1', 'db2');" | mysql -uroot

然而，目标db中的任何触发器都不会开心。您需要先删除它们，然后在重命名后重新创建它们。

mysql -uroot -e "call mysql.rename_db('test', 'blah2');" | mysql -uroot
ERROR 1435 (HY000) at line 4: Trigger in wrong schema

MySQL目前不支持通过其命令界面重命名数据库，但如果您可以访问MySQL存储数据库的目录，则可以重命名数据库。对于默认的MySQL安装，它通常在MySQL安装目录下的Data目录中。在Data目录下找到要重命名的数据库的名称并重命名它。不过，重命名目录可能会导致一些权限问题。请注意。

注意:在重命名数据库之前，必须停止MySQL

我建议创建一个新数据库(使用您想要的名称)，并将所需的数据从旧数据库导出/导入到新数据库。很简单。

如果您使用分层视图(视图从其他视图中提取数据)，从mysqldump导入原始输出可能无法工作，因为mysqldump不关心视图的正确顺序。因此，我编写了脚本，重新排序视图，以纠正飞行中的顺序。

它是这样的:

#!/usr/bin/env perl

use List::MoreUtils 'first_index'; #apt package liblist-moreutils-perl
use strict;
use warnings;


my $views_sql;

while (<>) {
    $views_sql .= $_ if $views_sql or index($_, 'Final view structure') != -1;
    print $_ if !$views_sql;
}

my @views_regex_result = ($views_sql =~ /(\-\- Final view structure.+?\n\-\-\n\n.+?\n\n)/msg);
my @views = (join("", @views_regex_result) =~ /\-\- Final view structure for view `(.+?)`/g);
my $new_views_section = "";
while (@views) {
    foreach my $view (@views_regex_result) {
        my $view_body = ($view =~ /\/\*.+?VIEW .+ AS (select .+)\*\/;/g )[0];
        my $found = 0;
        foreach my $view (@views) {
            if ($view_body =~ /(from|join)[ \(]+`$view`/) {
                $found = $view;
                last;
            }
        }
        if (!$found) {
            print $view;
            my $name_of_view_which_was_not_found = ($view =~ /\-\- Final view structure for view `(.+?)`/g)[0];
            my $index = first_index { $_ eq $name_of_view_which_was_not_found } @views;
            if ($index != -1) {
                splice(@views, $index, 1);
                splice(@views_regex_result, $index, 1);
            }
        }
    }
}

用法: mysqldump -u username -v olddatabase -p | ./mysqldump_view_reorder.pl | mysql -u username -p -D newdatabase .pl