I'm a newbie in sql queries and don't know how to solve the following question:
are there subclasses in which ALL chemicals have a MolMass < 400 ?
relation given (prim. key: ChemID):
Chemicals (ChemID, Name, MolMass, SubclassID)
Many thanks
Results 1 to 3 of 3
Thread: problem with a self join...Threaded View
|
|
|