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关系数据库管理系统RDBMS是我们数据库小组在RD—11微机上实现的。此系统设有数据定义语言DDL、数据操纵语言DML;还有求和、求平均值、计数、求最大值、求最小值等库函数。本文第一部分对上述内容作了简单介绍;第二部分介绍了数据子语言的预编译技术;第三部分介绍了LL(1)分析表改成状态表的算法。
Relational database management system RDBMS is implemented by our database team on the RD-11 microcomputer. This system has the data definition language DDL, the data manipulation language DML; Also sums up, averages, counts, seeks the maximum value, seeks the minimum value and so on the storehouse function. The first part of this article gives a brief introduction to the above contents; the second part introduces the pre-compilation technology of data sublanguage; the third part introduces the algorithm of LL (1) analysis table into state table.