existential quantifier
1.Taking three relations for example, applyin some relevant theories to discrete mathematics, this article converses the query of the universal quantifier problem into the query of equivalent existential quantifier, then to achieve it in SQL.
2.In this paper, we wish to explicate the scope properties of the cardinality wh-phrases and propose a decomposition analysis with which any of such phrases can be decomposed into a cardinality wh-operator and an existential group quantifier.
