Laravel Eloquent query where exists MySQL

Today, We want to share with you Laravel Eloquent query where exists.In this post we will show you Laravel 5 query builder where exists example, hear for Check If A Database Table Exists With Laravel we will give you demo and example for implement.In this post, we will learn about Laravel Advance Database Query Builder with an example.

Laravel Eloquent query where exists

There are the Following The simple About Laravel Eloquent query where exists Full Information With Example and source code.

As I will cover this Post with live Working example to develop PHP SQL exists in Laravel 5 query builder, so the Laravel Eloquent – WhereNotExists for this example is following below.

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We use simple Code PHP sql where exists clause in check laravel. whereExists through We can use Database in sql where exists clause in Latest version of the laravel Web project. It is simple and very easy to use as well as We can best way to implements and undestand. We can give simple fire SELECT statment in where some condition. We can see bellow source code with example as well as We can learn how to use simple whereExists in your Laravel app.

Simple SQL Query

SELECT *
FROM `products`
WHERE EXISTS
    (SELECT `products_cat`.`id`
     FROM `products_cat`
     WHERE products_cat.cat_id = products.id)

MySQL Using Laravel Query Builder

DB::table('products')
    ->whereExists(function ($query) {
        $query->select("products_cat.id")
              ->from('products_cat')
              ->whereRaw('products_cat.cat_id = products.id');
    })
    ->get();

Example 2: SQL exists in Laravel 5 query builder

$product = Products::whereNotExists(function ($query) use ($id_merchant) {
	$query->select(DB::raw(1))
		  ->from('merchant_poeni')
		  ->where('product.id', '=', 'a.id')
		  ->where('product_id', '=', $id_merchant);
})
->orderBy('created_at')
->first();

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Summary

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