laravel-5

Database: Query Builder 524
Joins
Inner Join Statement
The query builder may also be used to write join statements. To perform a basic SQL “inner join”,
you may use the join method on a query builder instance. The first argument passed to the join
method is the name of the table you need to join to, while the remaining arguments specify the
column constraints for the join. Of course, as you can see, you can join to multiple tables in a single
query:
1 $users = DB::table('users')
2 ->join('contacts', 'users.id', '=', 'contacts.user_id')
3 ->join('orders', 'users.id', '=', 'orders.user_id')
4 ->select('users.*', 'contacts.phone', 'orders.price')
5 ->get();
Left Join Statement
If you would like to perform a “left join” instead of an “inner join”, use the leftJoin method. The
leftJoin method has the same signature as the join method:
1 $users = DB::table('users')
2 ->leftJoin('posts', 'users.id', '=', 'posts.user_id')
3 ->get();
Cross Join Statement
To perform a “cross join” use the crossJoin method with the name of the table you wish to cross
join to. Cross joins generate a cartesian product between the first table and the joined table:
1 $users = DB::table('sizes')
2 ->crossJoin('colours')
3 ->get();