Database_ getting started – laravel – the php framework for web artisans

Laravel makes interacting with databases extremely simple across a variety of database backends using either raw SQL, the fluent query builder, and the Eloquent ORM. How to sql server Currently, Laravel supports four databases:

The database configuration for your application is located at config/database.php. Sql server news In this file you may define all of your database connections, as well as specify which connection should be used by default. Sql server 2008 express advanced Examples for most of the supported database systems are provided in this file.

By default, Laravel’s sample environment configuration is ready to use with Laravel Homestead, which is a convenient virtual machine for doing Laravel development on your local machine. Sql server service pack Of course, you are free to modify this configuration as needed for your local database. Sql server 2014 express with tools SQLite Configuration

After creating a new SQLite database using a command such as touch database/database.sqlite, you can easily configure your environment variables to point to this newly created database by using the database’s absolute path: DB_CONNECTION=sqlite

Laravel supports SQL Server out of the box; however, you will need to add the connection configuration for the database to your config/database.php configuration file: ‘sqlsrv’ => [

Sometimes you may wish to use one database connection for SELECT statements, and another for INSERT, UPDATE, and DELETE statements. Or in sql server Laravel makes this a breeze, and the proper connections will always be used whether you are using raw queries, the query builder, or the Eloquent ORM.

Note that two keys have been added to the configuration array: read and write.

Ms sql server 2008 Both of these keys have array values containing a single key: host. Ms sql server 11 The rest of the database options for the read and write connections will be merged from the main mysql array.

You only need to place items in the read and write arrays if you wish to override the values from the main array. Server 2012 sql So, in this case, will be used as the host for the “read” connection, while will be used for the “write” connection. From sql server The database credentials, prefix, character set, and all other options in the main mysql array will be shared across both connections.

When using multiple connections, you may access each connection via the connection method on the DB facade. Sql server for The name passed to the connection method should correspond to one of the connections listed in your config/database.php configuration file: $users = DB::connection(‘foo’)->select(…);

Once you have configured your database connection, you may run queries using the DB facade. Sql server express 32 bit The DB facade provides methods for each type of query: select, update, insert, delete, and statement. Ms sql server 2012 price Running A Select Query

The first argument passed to the select method is the raw SQL query, while the second argument is any parameter bindings that need to be bound to the query. Sql server installation Typically, these are the values of the where clause constraints. For sql server 2008 Parameter binding provides protection against SQL injection.

The select method will always return an array of results. Ms sql server 2008 express edition Each result within the array will be a PHP StdClass object, allowing you to access the values of the results: foreach ($users as $user) {

Instead of using ? to represent your parameter bindings, you may execute a query using named bindings: $results = DB::select(‘select * from users where id = :id’, [‘id’ => 1]); Running An Insert Statement

To execute an insert statement, you may use the insert method on the DB facade. Ms sql server training Like select, this method takes the raw SQL query as its first argument and bindings as its second argument: DB::insert(‘insert into users (id, name) values (?, ?)’, [1, ‘Dayle’]); Running An Update Statement

The update method should be used to update existing records in the database. Sql server registration The number of rows affected by the statement will be returned: $affected = DB::update(‘update users set votes = 100 where name = ?’, [‘John’]); Running A Delete Statement

The delete method should be used to delete records from the database. Sql server express 2008 r2 Like update, the number of rows affected will be returned: $deleted = DB::delete(‘delete from users’); Running A General Statement

Some database statements do not return any value. Latest version of sql server For these types of operations, you may use the statement method on the DB facade: DB::statement(‘drop table users’);

If you would like to receive each SQL query executed by your application, you may use the listen method. Ms sql server administration This method is useful for logging queries or debugging. Sql server standard edition You may register your query listener in a service provider:

You may use the transaction method on the DB facade to run a set of operations within a database transaction. Ms sql server 2012 express edition If an exception is thrown within the transaction Closure, the transaction will automatically be rolled back. Sql server enterprise If the Closure executes successfully, the transaction will automatically be committed. Sql server 2005 developer edition You don’t need to worry about manually rolling back or committing while using the transaction method: DB::transaction(function () {

The transaction method accepts an optional second argument which defines the number of times a transaction should be reattempted when a deadlock occurs. Sql server what is it Once these attempts have been exhausted, an exception will be thrown: DB::transaction(function () {

If you would like to begin a transaction manually and have complete control over rollbacks and commits, you may use the beginTransaction method on the DB facade: DB::beginTransaction();