Document where clause on joins.

queries.md

@@ -137,6 +137,16 @@ You may also specify more advanced join clauses:
   })
   ->get();
 
+If you would like to use a "where" style clause on your joins, you may use the `where` and `orWhere` methods on a join. Instead of comparing two columns, these methods will compare the column against a value:
+
+ DB::table('users')
+  ->join('contacts', function($join)
+  {
+  $join->on('users.id', '=', 'contacts.user_id')
+  ->where('contacts.user_id', '>', 5);
+  })
+  ->get();
+
 <a name="advanced-wheres"></a>
 ## Advanced Wheres