I have been reading about the using of fetch to get the dependencies of an entity .So its said if you use fetch=join to get these dependencies it will be use jut one sql and if you use fetch=select it will be used n+1 selects. So its better always to use fetch=join, isnt it?
Thanks

Use join has many problems but the most important is if you use join fetch mode you could retrieve a whole db with single query! And because of big time to execute query and available memory of your computer i am sure it is not what you would like to get.