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.是什么意思_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.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句