为了方便起见，下面是一个小shell脚本，必须使用两个参数执行:db-name和new db-name。

如果您不使用主目录中的.my.cnf文件，则可能需要在mysql行中添加登录参数。请在执行此脚本之前进行备份。

#!/usr/bin/env bash

mysql -e "CREATE DATABASE $2 DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;"
for i in $(mysql -Ns $1 -e "show tables");do
    echo "$1.$i -> $2.$i"
    mysql -e "rename TABLE $1.$i to $2.$i"
done
mysql -e "DROP DATABASE $1"

你可以使用这个shell脚本:

参考:如何重命名MySQL数据库?

#!/bin/bash
set -e # terminate execution on command failure

mysqlconn="mysql -u root -proot"
olddb=$1
newdb=$2
$mysqlconn -e "CREATE DATABASE $newdb"
params=$($mysqlconn -N -e "SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES \
                           WHERE table_schema='$olddb'")
for name in $params; do
      $mysqlconn -e "RENAME TABLE $olddb.$name to $newdb.$name";
done;
$mysqlconn -e "DROP DATABASE $olddb"

工作:

$ sh rename_database.sh oldname newname

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。

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);

TodoInTX的存储过程不太适合我。以下是我的尝试:

-- stored procedure rename_db: Rename a database my means of table copying.
-- Caveats: 
-- Will clobber any existing database with the same name as the 'new' database name.
-- ONLY copies tables; stored procedures and other database objects are not copied.
-- Tomer Altman (taltman@ai.sri.com)

delimiter //
DROP PROCEDURE IF EXISTS rename_db;
CREATE PROCEDURE rename_db(IN old_db VARCHAR(100), IN new_db VARCHAR(100))
BEGIN
    DECLARE current_table VARCHAR(100);
    DECLARE done INT DEFAULT 0;
    DECLARE old_tables CURSOR FOR select table_name from information_schema.tables where table_schema = old_db;
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;

    SET @output = CONCAT('DROP SCHEMA IF EXISTS ', new_db, ';'); 
    PREPARE stmt FROM @output;
    EXECUTE stmt;

    SET @output = CONCAT('CREATE SCHEMA IF NOT EXISTS ', new_db, ';');
    PREPARE stmt FROM @output;
    EXECUTE stmt;

    OPEN old_tables;
    REPEAT
        FETCH old_tables INTO current_table;
        IF NOT done THEN
        SET @output = CONCAT('alter table ', old_db, '.', current_table, ' rename ', new_db, '.', current_table, ';');
        PREPARE stmt FROM @output;
        EXECUTE stmt;

        END IF;
    UNTIL done END REPEAT;

    CLOSE old_tables;

END//
delimiter ;

简单的方法

切换到数据库目录:

cd /var/lib/mysql/

关闭MySQL…这很重要!

/etc/init.d/mysql stop

好吧，这种方法不适用于InnoDB或BDB-Databases。

重命名数据库:

mv old-name new-name

.．.或者桌子……

cd database/

mv old-name.frm new-name.frm

mv old-name.MYD new-name.MYD

mv old-name.MYI new-name.MYI

重新启动MySQL

/etc/init.d/mysql start

做……

好吧，这种方法不适用于InnoDB或BDB数据库。在这种情况下，您必须转储数据库并重新导入它。