laravel raw sql query code example

Example 1: DB::transaction

use Illuminate\Support\Facades\DB;

DB::transaction(function () {
    DB::update('update users set votes = 1');

    DB::delete('delete from posts');
});

Example 2: laravel sql query

use Illuminate\Support\Facades\DB;

$users = DB::select('select * from users');

foreach ($users as $user) {
    echo $user->name;
}

Example 3: raw query in laravel with parameters

$someVariable = Input::get("some_variable");
$results = DB::select( DB::raw("SELECT * FROM some_table WHERE some_col = :somevariable"), array(
   'somevariable' => $someVariable,
 ));

DB::statement( 'ALTER TABLE HS_Request AUTO_INCREMENT=:incrementStart', array('incrementStart' => 9999) );

Example 4: raw queries in laravel

DB::statement('UPDATE users SET role_id = 1 WHERE role_id IS NULL AND YEAR(created_at) > 2020');

Example 5: TRANSACTON LARAVEL QUERY BUILDER

DB::beginTransaction();

try {
    DB::insert(...);    
    DB::commit();
} catch (\Throwable $e) {
    DB::rollback();
    throw $e;
}

Example 6: Writing into the database with one click laravel

<form action="{{ route('signup') }}" method="post">
    <button type="submit"> submit </button>
</form>