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Datalog vs first-order logic
Ajtai, Miklos; Gurevich, Yuri
1994-12
Citation:Ajtai, Miklos, Gurevich, Yuri (1994/12)."Datalog vs first-order logic." Journal of Computer and System Sciences 49(3): 562-588. <http://hdl.handle.net/2027.42/31164>
Abstract: Our main result is that every datalog query expressible in first-order logic is bounded; in terms of classical model theory it is a kind of compactness theorem for finite structures. In addition, we give some counter-examples delimiting the main result.