在PHP中:

function cloneDatabase($dbName, $newDbName){
    global $admin;
    $db_check = @mysql_select_db ( $dbName );
    $getTables  =   $admin->query("SHOW TABLES");   
    $tables =   array();
    while($row = mysql_fetch_row($getTables)){
        $tables[]   =   $row[0];
    }
    $createTable    =   mysql_query("CREATE DATABASE `$newDbName` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;") or die(mysql_error());
    foreach($tables as $cTable){
        $db_check   =   @mysql_select_db ( $newDbName );
        $create     =   $admin->query("CREATE TABLE $cTable LIKE ".$dbName.".".$cTable);
        if(!$create) {
            $error  =   true;
        }
        $insert     =   $admin->query("INSERT INTO $cTable SELECT * FROM ".$dbName.".".$cTable);
    }
    return !isset($error);
}


// usage
$clone  = cloneDatabase('dbname','newdbname');  // first: toCopy, second: new database

Mysqldump是个不错的解决方案。复制数据库的最简单方法:

mysqldump -uusername -ppass dbname1 |MySQL -uusername -ppass dbname2

此外，您可以通过以下方式更改存储引擎:

mysqldump -uusername -ppass dbname1 |sed 's/InnoDB/RocksDB/' |MySQL -uusername -ppass dbname2

一个SQL，显示SQL命令，需要运行复制一个数据库从一个数据库到另一个。对于每个表，都有创建表语句和插入语句。它假设两个数据库都在同一台服务器上:

select @fromdb:="crm";
select @todb:="crmen";

SET group_concat_max_len=100000000;


SELECT  GROUP_CONCAT( concat("CREATE TABLE `",@todb,"`.`",table_name,"` LIKE `",@fromdb,"`.`",table_name,"`;\n",
"INSERT INTO `",@todb,"`.`",table_name,"` SELECT * FROM `",@fromdb,"`.`",table_name,"`;") 

SEPARATOR '\n\n')

as sqlstatement
 FROM information_schema.tables where table_schema=@fromdb and TABLE_TYPE='BASE TABLE';

没有mysqldump克隆数据库表的最好方法:

创建一个新数据库。 使用query创建clone-queries: SET @NewSchema = 'your_new_db'; SET @OldSchema = 'your_exists_db'; SELECT CONCAT('CREATE TABLE '，@NewSchema，')。'，table_name，' LIKE '， TABLE_SCHEMA，'.'，table_name，';插入'，@NewSchema，'。”,table_name“SELECT * FROM”,TABLE_SCHEMA。“table_name,”,”) 从information_schema。TABLE_SCHEMA = @OldSchema AND TABLE_TYPE != 'VIEW'; 运行输出!

但是请注意，上面的脚本只是快速克隆表-而不是视图，触发器和用户函数:你可以通过mysqldump——no-data——triggers -uroot -ppassword快速获得结构，然后使用仅克隆插入语句。

为什么这是实际问题?因为如果DB超过2Gb, mysqldump的上传速度非常慢。你不能仅仅通过复制DB文件来克隆InnoDB表(比如快照备份)。

请注意，mysql实用工具....上有一个mysqldbcopy命令作为添加的一部分 https://dev.mysql.com/doc/mysql-utilities/1.5/en/utils-task-clone-db.html

在PHP中:

function cloneDatabase($dbName, $newDbName){
    global $admin;
    $db_check = @mysql_select_db ( $dbName );
    $getTables  =   $admin->query("SHOW TABLES");   
    $tables =   array();
    while($row = mysql_fetch_row($getTables)){
        $tables[]   =   $row[0];
    }
    $createTable    =   mysql_query("CREATE DATABASE `$newDbName` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;") or die(mysql_error());
    foreach($tables as $cTable){
        $db_check   =   @mysql_select_db ( $newDbName );
        $create     =   $admin->query("CREATE TABLE $cTable LIKE ".$dbName.".".$cTable);
        if(!$create) {
            $error  =   true;
        }
        $insert     =   $admin->query("INSERT INTO $cTable SELECT * FROM ".$dbName.".".$cTable);
    }
    return !isset($error);
}


// usage
$clone  = cloneDatabase('dbname','newdbname');  // first: toCopy, second: new database