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Laravel Advance Database Query Builder – Technology

Laravel Advance Database Query Builder – Technology

In this post we will give you information about Laravel Advance Database Query Builder – Technology. Hear we will give you detail about Laravel Advance Database Query Builder – TechnologyAnd how to use it also give you demo for it if it is necessary.

Today, We want to share with you Laravel Advance Database Query Builder.In this post we will show you Database: Query Builder – Laravel, hear for Advanced query using Eloquent we will give you demo and example for implement.In this post, we will learn about Laravel 5.6 Database: Query Builder with an example.

Table of Contents

Laravel Advance Database Query Builder

There are the Following The simple About Laravel Advance Database Query Builder Full Information With Example and source code.

As I will cover this Post with live Working example to develop php – Laravel Delete Query Builder, so the laravel query builder for this example is following below.

Getting All Rows From A Table using Laravel 5.6

public function index()
{
    $employees = DB::table('employees')->get();
    return view('employee.index', ['employees' => $employees]);
}

Getting A Single Row or Column From A Table

$employee = DB::table('employees')->where('name', 'Jaydeep')->first();
echo $employee->name;

or

$email = DB::table('employees')->where('name', 'Jaydeep')->value('email');

Getting A List Of Column Values using Laravel 5.6 pluck

$members = DB::table('roles')->pluck('title');

foreach ($members as $title) {
    echo $title;
}

$roles = DB::table('roles')->pluck('title', 'name');

foreach ($roles as $name => $title) {
    echo $title;
}

Laravel 5.6 Aggregates

$employees = DB::table('employees')->count();
$rate = DB::table('memberships')->max('rate');

$rate = DB::table('memberships')
->where('finalized', 1)
->avg('rate');

Laravel 5.6 Determining If Records Exist

return DB::table('memberships')->where('finalized', 1)->exists();
return DB::table('memberships')->where('finalized', 1)->doesntExist();

Laravel 5.6 Specifying A Select Clause

$employees = DB::table('employees')->select('name', 'email as employee_email')->get();
$employees = DB::table('employees')->distinct()->get();

$query = DB::table('employees')->select('name');
$employees = $query->addSelect('age')->get();

Laravel 5.6 Raw Expressions

$employees = DB::table('employees')
->select(DB::raw('count(*) as employee_count, type_of_status'))
->where('type_of_status', '<>', 1)
->groupBy('type_of_status')
->get();

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Laravel 5.6 selectRaw

$memberships = DB::table('memberships')
->selectRaw('rate * ? as rate_with_tax', [1.0825])
->get();

Laravel 5.6 whereRaw / orWhereRaw

$memberships = DB::table('memberships')
->whereRaw('rate > IF(state = "TX", ?, 100)', [200])
->get();

Laravel 5.6 havingRaw / orHavingRaw

$memberships = DB::table('memberships')
->select('department', DB::raw('SUM(rate) as total_sales'))
->groupBy('department')
->havingRaw('SUM(rate) > ?', [2500])
->get();

Laravel 5.6 orderByRaw

$memberships = DB::table('memberships')
->orderByRaw('updated_at - created_at DESC')
->get();

Laravel 5.6 Inner Join Clause

$employees = DB::table('employees')
->join('contacts', 'employees.id', '=', 'contacts.employee_id')
->join('memberships', 'employees.id', '=', 'memberships.employee_id')
->select('employees.*', 'contacts.phone', 'memberships.rate')
->get();

Left Join Clause using Laravel 5.6

$employees = DB::table('employees')
->leftJoin('posts', 'employees.id', '=', 'posts.employee_id')
->get();

<h3>Cross Join Clause</h3>

$employees = DB::table('sizes')
->crossJoin('colours')
->get();

Laravel 5.6 Advanced Join Clauses

DB::table('employees')
->join('contacts', function ($join) {
	$join->on('employees.id', '=', 'contacts.employee_id')->orOn(...);
})
->get();

DB::table('employees')
->join('contacts', function ($join) {
	$join->on('employees.id', '=', 'contacts.employee_id')
     ->where('contacts.employee_id', '>', 5);
})
->get();

Laravel 5.6 Sub-Query Joins

$latestPosts = DB::table('posts')
->select('employee_id', DB::raw('MAX(created_at) as last_post_created_at'))
->where('is_published', true)
->groupBy('employee_id');

$employees = DB::table('employees')
->joinSub($latestPosts, 'latest_posts', function($join) {
	$join->on('employees.id', '=', 'latest_posts.employee_id');
})->get();

Laravel 5.6 Unions

$first = DB::table('employees')
->whereNull('first_name');

$employees = DB::table('employees')
->whereNull('last_name')
->union($first)
->get();

Laravel 5.6 Where Clauses

$employees = DB::table('employees')->where('total_likes', '=', 100)->get();
$employees = DB::table('employees')->where('total_likes', 100)->get();

$employees = DB::table('employees')
->where('total_likes', '>=', 100)
->get();

$employees = DB::table('employees')
->where('total_likes', '<>', 100)
->get();

$employees = DB::table('employees')
->where('name', 'like', 'T%')
->get();

$employees = DB::table('employees')->where([
    ['type_of_status', '=', '1'],
    ['subscribed', '<>', '1'],
])->get();

Laravel 5.6 Or Statements

$employees = DB::table('employees')
->where('total_likes', '>', 100)
->orWhere('name', 'Jaydeep')
->get();
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