how to get the version of a set of object at a given point in time / transaction id#334

let's suppose I have a different set of transactions affecting different tables: - transaction 1 affects object with id `myObject` in table `A` - transaction 2 affects object with id `myObject2` in table `A` - transaction 3 affects object with id `myObject3` in table `B` how can i query all the objects values in table `A` and `B` at the time point of transaction 2? thx :)