数据库理论和圆柱格

28th Annual Symposium on Foundations of Computer Science (sfcs 1987) Pub Date : 1987-10-12 DOI:10.1109/SFCS.1987.17

S. Cosmadakis

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引用次数: 12

摘要

数据库的关系模型[Co 1, Co2]为理解数据库设计问题提供了有价值的形式化基础。关系数据库由一组表(关系)组成，其中每个表包含一组记录(元组)。例如，我们可能有一个具有两个关系Rand S的数据库，其中R有两个列，分别标记为EMP(雇员)和SAL(工资)，而S有两个列，分别标记为PRJ(项目)和MGR(经理)。

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Database theory and cylindric lattices

The relational model for databases [Co I, Co2] provides a valuable formal foundation for understanding the issues of database design. A relational database consists of a set of tables (relations), where each table contains a set of records (tuples). For example, we might have a database with two relations Rand S, where R has two columns labeled EMP (employee) and SAL (salary), and S has two columns labeled PRJ (project) and MGR (manager).

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28th Annual Symposium on Foundations of Computer Science (sfcs 1987)

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