How can I use Laravel's query builder for complex queries?

How can I use Laravel's query builder for complex queries?

You can use Laravel's query builder to create complex queries by chaining methods like where, join, and groupBy. For example, you can combine multiple conditions using closures.

Can you give me an example of a complex query using joins?

Sure! Here's an example: DB::table('users')->join('posts', 'users.id', '=', 'posts.user_id')->where('users.active', 1)->select('users.*', 'posts.title')->get(); This retrieves active users and their post titles.

What about using subqueries in Laravel?

You can use subqueries with the DB::raw method or by using the select method. For instance: DB::table('users')->where('id', function($query) { $query->select('user_id')->from('posts')->where('title', 'Laravel'); })->get(); This fetches users who have posts with the title 'Laravel'.