DB

Basic Database Usage

DB::connection('connection_name');
// Running A Select Query
$results = DB::select('select * from users where id = ?', [1]);
$results = DB::select('select * from users where id = :id', ['id' => 1]);
// Running A General Statement
DB::statement('drop table users');
// Listening For Query Events
DB::listen(function($sql, $bindings, $time){ code_here; });
// Database Transactions
DB::transaction(function()
{
  DB::table('users')->update(['votes' => 1]);
  DB::table('posts')->delete();
});
DB::beginTransaction();
DB::rollback();
DB::commit();

Query Builder

// Retrieving All Rows From A Table
DB::table('name')->get();
// Chunking Results From A Table
DB::table('users')->chunk(100, function($users)
{
  foreach ($users as $user)
  {
      
//
 }
});
// Retrieving A Single Row From A Table
$user = DB::table('users')->where('name', 'John')->first();
DB::table('name')->first();
// Retrieving A Single Column From A Row
$name = DB::table('users')->where('name', 'John')->pluck('name');
DB::table('name')->pluck('column');
// Retrieving A List Of Column Values
$roles = DB::table('roles')->lists('title');
$roles = DB::table('roles')->lists('title', 'name');
// Specifying A Select Clause
$users = DB::table('users')->select('name', 'email')->get();
$users = DB::table('users')->distinct()->get();
$users = DB::table('users')->select('name as user_name')->get();
// Adding A Select Clause To An Existing Query
$query = DB::table('users')->select('name');
$users = $query->addSelect('age')->get();
// Using Where Operators
$users = DB::table('users')->where('votes', '>', 100)->get();
$users = DB::table('users')
              ->where('votes', '>', 100)
              ->orWhere('name', 'John')
              ->get();
$users = DB::table('users')
              ->whereBetween('votes', [1, 100])->get();
$users = DB::table('users')
              ->whereNotBetween('votes', [1, 100])->get();
$users = DB::table('users')
              ->whereIn('id', [1, 2, 3])->get();
$users = DB::table('users')
              ->whereNotIn('id', [1, 2, 3])->get();
$users = DB::table('users')
              ->whereNull('updated_at')->get();
DB::table('name')->whereNotNull('column')->get();
// Dynamic Where Clauses
$admin = DB::table('users')->whereId(1)->first();
$john = DB::table('users')
              ->whereIdAndEmail(2, 'john@doe.com')
              ->first();
$jane = DB::table('users')
              ->whereNameOrAge('Jane', 22)
              ->first();
// Order By, Group By, And Having
$users = DB::table('users')
              ->orderBy('name', 'desc')
              ->groupBy('count')
              ->having('count', '>', 100)
              ->get();
DB::table('name')->orderBy('column')->get();
DB::table('name')->orderBy('column','desc')->get();
DB::table('name')->having('count', '>', 100)->get();
// Offset & Limit
$users = DB::table('users')->skip(10)->take(5)->get();

Joins

// Basic Join Statement
DB::table('users')
          ->join('contacts', 'users.id', '=', 'contacts.user_id')
          ->join('orders', 'users.id', '=', 'orders.user_id')
          ->select('users.id', 'contacts.phone', 'orders.price')
          ->get();
// Left Join Statement
DB::table('users')
      ->leftJoin('posts', 'users.id', '=', 'posts.user_id')
      ->get();
// select * from users where name = 'John' or (votes > 100 and title <> 'Admin')
DB::table('users')
          ->where('name', '=', 'John')
          ->orWhere(function($query)
          {
              $query->where('votes', '>', 100)
                    ->where('title', '<>', 'Admin');
          })
          ->get();

Aggregates

$users = DB::table('users')->count();
$price = DB::table('orders')->max('price');
$price = DB::table('orders')->min('price');
$price = DB::table('orders')->avg('price');
$total = DB::table('users')->sum('votes');

DB::table('name')->remember(5)->get();
DB::table('name')->remember(5, 'cache-key-name')->get();
DB::table('name')->cacheTags('my-key')->remember(5)->get();
DB::table('name')->cacheTags(array('my-first-key','my-second-key'))->remember(5)->get();

Raw Expressions

$users = DB::table('users')
                   ->select(DB::raw('count(*) as user_count, status'))
                   ->where('status', '<>', 1)
                   ->groupBy('status')
                   ->get();
// return rows
DB::select('select * from users where id = ?', array('value'));
// return nr affected rows
DB::insert('insert into foo set bar=2');
DB::update('update foo set bar=2');
DB::delete('delete from bar');
// returns void
DB::statement('update foo set bar=2');
// raw expression inside a statement
DB::table('name')->select(DB::raw('count(*) as count, column2'))->get();

Inserts / Updates / Deletes / Unions / Pessimistic Locking

// Inserts
DB::table('users')->insert(
  ['email' => 'john@example.com', 'votes' => 0]
);
$id = DB::table('users')->insertGetId(
  ['email' => 'john@example.com', 'votes' => 0]
);
DB::table('users')->insert([
  ['email' => 'taylor@example.com', 'votes' => 0],
  ['email' => 'dayle@example.com', 'votes' => 0]
]);
// Updates
DB::table('users')
          ->where('id', 1)
          ->update(['votes' => 1]);
DB::table('users')->increment('votes');
DB::table('users')->increment('votes', 5);
DB::table('users')->decrement('votes');
DB::table('users')->decrement('votes', 5);
DB::table('users')->increment('votes', 1, ['name' => 'John']);
// Deletes
DB::table('users')->where('votes', '<', 100)->delete();
DB::table('users')->delete();
DB::table('users')->truncate();
// Unions
 // The unionAll() method is also available, and has the same method signature as union.
$first = DB::table('users')->whereNull('first_name');
$users = DB::table('users')->whereNull('last_name')->union($first)->get();
// Pessimistic Locking
DB::table('users')->where('votes', '>', 100)->sharedLock()->get();
DB::table('users')->where('votes', '>', 100)->lockForUpdate()->get();

Last updated 2 years ago