{"title":"Ramiz\u2019s blog about development","link":[{"@attributes":{"href":"https:\/\/kongulov.dev\/atom.xml","rel":"self"}},{"@attributes":{"href":"https:\/\/kongulov.dev\/"}}],"updated":"2026-01-21T21:27:27+04:00","id":"https:\/\/kongulov.dev","author":{"name":"Ramiz Kongulov","email":"ramiz.kongulov@gmail.com"},"entry":[{"title":"Configuring and Utilizing Multiple Databases in Laravel","link":{"@attributes":{"href":"https:\/\/kongulov.dev\/blog\/configuring-and-utilizing-multiple-databases-in-laravel"}},"updated":"2024-04-29T00:00:00+04:00","id":"https:\/\/kongulov.dev\/blog\/configuring-and-utilizing-multiple-databases-in-laravel","content":"

In Laravel, managing multiple databases is a common requirement for complex applications where data is distributed across different databases.\nWhether you need to interact with multiple databases for sharding, legacy systems, or simply for better organization, Laravel provides a convenient way to handle multiple database connections out of the box.\nn this guide, we\u2019ll explore how to configure and utilize multiple database connections in Laravel, along with practical examples to demonstrate various scenarios.<\/p>\n\n

Before diving into the usage, let\u2019s set up multiple database connections in Laravel.\nLaravel\u2019s database configuration is stored in the config\/database.php<\/code> file.\nInside this file, you\u2019ll find an array of database connections. To add a new connection, simply define a new array with the connection details.<\/p>\n\n

'connections'<\/span> =><\/span> [<\/span>\n    'mysql'<\/span> =><\/span> [<\/span>\n        'driver'<\/span> =><\/span> 'mysql'<\/span>,<\/span>\n        'host'<\/span> =><\/span> env<\/span>(<\/span>'DB_HOST'<\/span>,<\/span> '127.0.0.1'<\/span>),<\/span>\n        'port'<\/span> =><\/span> env<\/span>(<\/span>'DB_PORT'<\/span>,<\/span> '3306'<\/span>),<\/span>\n        'database'<\/span> =><\/span> env<\/span>(<\/span>'DB_DATABASE'<\/span>,<\/span> 'forge'<\/span>),<\/span>\n        'username'<\/span> =><\/span> env<\/span>(<\/span>'DB_USERNAME'<\/span>,<\/span> 'forge'<\/span>),<\/span>\n        'password'<\/span> =><\/span> env<\/span>(<\/span>'DB_PASSWORD'<\/span>,<\/span> ''<\/span>),<\/span>\n        'charset'<\/span> =><\/span> 'utf8mb4'<\/span>,<\/span>\n        'collation'<\/span> =><\/span> 'utf8mb4_unicode_ci'<\/span>,<\/span>\n        'prefix'<\/span> =><\/span> ''<\/span>,<\/span>\n        'strict'<\/span> =><\/span> true<\/span>,<\/span>\n        'engine'<\/span> =><\/span> null<\/span>,<\/span>\n    ],<\/span>\n\n    'second_db'<\/span> =><\/span> [<\/span>\n        'driver'<\/span> =><\/span> 'mysql'<\/span>,<\/span>\n        'host'<\/span> =><\/span> env<\/span>(<\/span>'SECOND_DB_HOST'<\/span>,<\/span> '127.0.0.1'<\/span>),<\/span>\n        'port'<\/span> =><\/span> env<\/span>(<\/span>'SECOND_DB_PORT'<\/span>,<\/span> '3306'<\/span>),<\/span>\n        'database'<\/span> =><\/span> env<\/span>(<\/span>'SECOND_DB_DATABASE'<\/span>,<\/span> 'forge'<\/span>),<\/span>\n        'username'<\/span> =><\/span> env<\/span>(<\/span>'SECOND_DB_USERNAME'<\/span>,<\/span> 'forge'<\/span>),<\/span>\n        'password'<\/span> =><\/span> env<\/span>(<\/span>'SECOND_DB_PASSWORD'<\/span>,<\/span> ''<\/span>),<\/span>\n        'charset'<\/span> =><\/span> 'utf8mb4'<\/span>,<\/span>\n        'collation'<\/span> =><\/span> 'utf8mb4_unicode_ci'<\/span>,<\/span>\n        'prefix'<\/span> =><\/span> ''<\/span>,<\/span>\n        'strict'<\/span> =><\/span> true<\/span>,<\/span>\n        'engine'<\/span> =><\/span> null<\/span>,<\/span>\n    ],<\/span>\n],<\/span>\n<\/code><\/pre><\/div><\/div>\n\n
We\u2019ve added a new database connection named second_db<\/code> here. Ensure you\u2019ve updated the environment variables in your .env<\/code> file accordingly.<\/p>\n\n
Once you\u2019ve set up the database connections, you can utilize them throughout your application.\nLaravel\u2019s Eloquent ORM provides a convenient way to interact with databases.<\/p>\n\n
1. Model Setup<\/h2>\n\n
When defining Eloquent models that use a different database connection, specify the $connection<\/code> property.<\/p>\n\n
<?php<\/span>\n\nnamespace<\/span> App\\Models<\/span>;<\/span>\n\nuse<\/span> Illuminate\\Database\\Eloquent\\Model<\/span>;<\/span>\n\nclass<\/span> SecondModel<\/span> extends<\/span> Model<\/span>\n{<\/span>\n    protected<\/span> $connection<\/span> =<\/span> 'second_db'<\/span>;<\/span>\n}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n
2. Querying Data<\/h2>\n\n
When querying data from a specific database connection, you can use the on<\/code> method on the Eloquent query builder.<\/p>\n\n
$users<\/span> =<\/span> App\\Models\\SecondModel<\/span>::<\/span>on<\/span>(<\/span>'second_db'<\/span>)<\/span>-><\/span>get<\/span>();<\/span>\n<\/code><\/pre><\/div><\/div>\n\n
3. Raw SQL Queries<\/h2>\n\n
You can execute raw SQL queries on a specific connection using the DB::connection()<\/code> method.<\/p>\n\n
$users<\/span> =<\/span> DB<\/span>::<\/span>connection<\/span>(<\/span>'second_db'<\/span>)<\/span>-><\/span>select<\/span>(<\/span>'select * from table_name'<\/span>);<\/span>\n<\/code><\/pre><\/div><\/div>\n\n
Conclusion<\/h2>\n\n
Managing multiple databases in Laravel provides flexibility and scalability to your applications.\nBy following the steps outlined in this guide, you can seamlessly configure and utilize multiple database connections in your Laravel projects.\nWhether it\u2019s for distributed data storage, legacy integrations, or other requirements, Laravel\u2019s robust database management capabilities make handling multiple databases a breeze.<\/p>\n\n"},{"title":"Building Efficient Applications with MySQL Stored Procedures","link":{"@attributes":{"href":"https:\/\/kongulov.dev\/blog\/building-efficient-applications-with-mysql-stored-procedures"}},"updated":"2023-09-22T00:00:00+04:00","id":"https:\/\/kongulov.dev\/blog\/building-efficient-applications-with-mysql-stored-procedures","content":"
MySQL stored procedure is a powerful database function that allows you to store and execute a set of SQL statements in the database,\nsimilar to functions in programming. The storage process can greatly improve the performance, security and maintainability of the database.\nThis article will introduce the use of MySQL stored procedures in detail.<\/p>\n\n
What is a MySQL stored procedure?<\/h2>\n\n
MySQL stored procedures are a set of precompiled SQL statements that are stored in the database with a name and can be called and executed at any time.\nStored procedures can accept input arguments, perform a series of operations, and return results.\nThese characteristics make stored procedures an ideal tool for handling complex queries, data manipulation, and transaction management.<\/p>\n\n
Create a stored procedure<\/h2>\n\n
To create a MySQL stored procedure, you use CREATE PROCEDURE<\/code> statements. Here is a simple example:<\/p>\n\n
DELIMITER<\/span> \/\/<\/span>\nCREATE<\/span> PROCEDURE<\/span> GetUser<\/span>(<\/span>IN<\/span> user_id<\/span> INT<\/span>)<\/span>\nBEGIN<\/span>\n    SELECT<\/span> *<\/span> FROM<\/span> users<\/span> WHERE<\/span> id<\/span> =<\/span> user_id<\/span>;<\/span>\nEND<\/span> \/\/<\/span>\nDELIMITER<\/span> ;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n