'\think\db\builder\' not found

根据提供的引用内容，'\think\db\builder\' not found的错误可能是由于命名空间不正确导致的。可以尝试修改Builder.php的命名空间为namespace think\db\builder，类名改为Oracle，然后将其放到\thinkphp\library\think\db\builder目录下，并将其重命名为Oracle.php。如果还是无法解决问题，可以尝试使用composer安装oracle驱动或者手动下载驱动并按照引用中的方法进行配置。

相关问题

Class 'think\mongo\Db' not found

I for the confusion. In ThinkPHP 6, the `thinkmongo\Db` class is not available by default. However you can use the `think\Mongo` class to interact with MongoDB. Here an example of how you can perform queries using MongoDB in ThinkPHP 6:

1. Query all records:

use think\Mongo;

$users = Mongo::name('user')->select();

2. Condition query:

use think\Mongo;

$user = Mongo::name('user')->where('age', '>', 18)->find();

3. Multiple condition query:

use think\Mongo;

$users = Mongo::name('user')
    ->where('age', '>', 18)
    ->where('gender', 'male')
    ->select();

4. Sorting query:

use think\Mongo;

$users = Mongo::name('user')->order('age', 'desc')->select();

5. Pagination query:

use think\Mongo;

$users = Mongo::name('user')->page(1, 10)->select();

6. Specifying fields to retrieve:

use think\Mongo;

$users = Mongo::name('user')->field('name,age')->select();

Please make sure you have the `topthink/think-mongo` package installed and properly configured in your `composer.json` file, and run `composer update` to install the package dependencies. Additionally, ensure that you have the correct namespace and class name in your code.

Class 'think\model\Mongo' not found

I apologize for the confusion. In ThinkPHP 6, the `think\model\Mongo` class is not available by default. However, you can still interact with MongoDB using the `think\mongo\Db` class. Here's an example of how you can perform queries using MongoDB in ThinkPHP 6:

1. Query all records:

use think\mongo\Db;

$users = Db::name('user')->select();

2. Condition query:

use think\mongo\Db;

$user = Db::name('user')->where('age', '>', 18)->find();

3. Multiple condition query:

use think\mongo\Db;

$users = Db::name('user')
    ->where('age', '>', 18)
    ->where('gender', 'male')
    ->select();

4. Sorting query:

use think\mongo\Db;

$users = Db::name('user')->order('age', 'desc')->select();

5. Pagination query:

use think\mongo\Db;

$users = Db::name('user')->page(1, 10)->select();

6. Specifying fields to retrieve:

use think\mongo\Db;

$users = Db::name('user')->field('name,age')->select();

Please make sure you have the `topthink/think-mongo` package installed and properly configured in your `config/database.php` file to use MongoDB in ThinkPHP 6.