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=

我是这样做的: 对现有数据库进行备份。它将为您提供一个db.zip.tmp，然后在命令提示符中写入以下内容

"C:\Program Files (x86)\MySQL\MySQL Server 5.6\bin\ MySQL .exe localhost -u root -p[password][新数据库名]< "C:\Backups\db.zip.tmp"

对于InnoDB，下面的方法似乎是可行的:创建新的空数据库，然后依次将每个表重命名为新的数据库:

RENAME TABLE old_db.table TO new_db.table;

之后，您将需要调整权限。

对于在shell中编写脚本，您可以使用以下任何一种:

mysql -u username -ppassword old_db -sNe 'show tables' | while read table; \ 
    do mysql -u username -ppassword -sNe "rename table old_db.$table to new_db.$table"; done

OR

for table in `mysql -u root -ppassword -s -N -e "use old_db;show tables from old_db;"`; do mysql -u root -ppassword -s -N -e "use old_db;rename table old_db.$table to new_db.$table;"; done;

注:

选项-p和密码之间没有空格。如果您的数据库没有密码，请删除-u username -ppassword部分。 如果某个表有触发器，则不能使用上述方法将其移动到另一个数据库(将导致trigger in wrong schema错误)。如果是这种情况，使用传统的方法克隆一个数据库，然后删除旧的: Mysqldump old_db | mysql new_db 如果你有存储过程，你可以在之后复制它们: mysqldump -R old_db | mysql的new_db

你们这些家伙会为此开枪打死我的，很可能这不会每次都管用，当然，这违反了所有的逻辑……但我刚试过的是…停止MySQL引擎，以root身份登录，并在文件系统级别上简单地重命名数据库....

我在OSX上，只改变了情况，从bedbf到bedbf。令我惊讶的是，它竟然起作用了……

我不建议在生产DB上使用它。我只是做了个实验……

祝你好运! -)

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

这里已经有很多非常好的答案，但我没有看到PHP版本。这将在大约一秒钟内复制一个800M DB。

$oldDbName = "oldDBName";
$newDbName = "newDBName";
$oldDB     = new mysqli("localhost", "user", "pass", $oldDbName);
if($oldDB->connect_errno){
    echo "Failed to connect to MySQL: (" . $oldDB->connect_errno . ") " . $oldDB->connect_error;
    exit;
}
$newDBQuery = "CREATE DATABASE IF NOT EXISTS {$newDbName}";
$oldDB->query($newDBQuery);
$newDB = new mysqli("localhost", "user", "pass");
if($newDB->connect_errno){
    echo "Failed to connect to MySQL: (" . $newDB->connect_errno . ") " . $newDB->connect_error;
    exit;
}

$tableQuery  = "SHOW TABLES";
$tableResult = $oldDB->query($tableQuery);
$renameQuery = "RENAME TABLE\n";
while($table = $tableResult->fetch_array()){
    $tableName = $table["Tables_in_{$oldDbName}"];
    $renameQuery .= "{$oldDbName}.{$tableName} TO {$newDbName}.{$tableName},";
}
$renameQuery = substr($renameQuery, 0, strlen($renameQuery) - 1);
$newDB->query($renameQuery);