multi-query

So I want to grab data from database, which method is faster, create several queries or one multi-query ? Each "round trip" to the database will have some overhead. So the fewer round-trips, the less overhead. Consider also that fewer requests means fewer packets from client to server. If the result of the consolidated query gives you just what you want, then single query is the way to go. If your single query is returning extra or redundant data (perhaps because of de-normalization) then the overhead savings of a single round trip may be lost in the extra data transferred. Another

Is it possible to use a multiquery and have two hql queries returning two different sets of entities where one of the sets are used in the other and that the session "fixes" this via the first level cache? E.g. scenario (a dumb one and it could be solved with joins) public class Room { ... public virtual ISet<Bookings> Bookings {get;set;} public virtual bool IsAvailible {get;set;} ... } public class Booking { ... } After executing a multicriteria with two hql's: returning all rooms where IsAvailible = true returning all bookings having a room that has a room that IsAvailible when accessing a