期刊名称：International Journal of Computer and Information Technology
印刷版ISSN：2279-0764
出版年度：2014
卷号：3
期号：3
页码：490
出版社：International Journal of Computer and Information Technology
摘要：Queries that involve words like "every", "only", etc., are generally difficult to formulate in SQL. In this paper, we analyze the problems and propose a set of set-comparison opera- tors to enhance the usability of SQL. These operators allow users to formulate conventionally difficult queries in an easier way, greatly enhancing the user-friendliness of SQL.
