An introduction to database systems: vol. I (4th ed.)
An introduction to database systems: vol. I (4th ed.)
System R: relational approach to database management
ACM Transactions on Database Systems (TODS)
The design and implementation of INGRES
ACM Transactions on Database Systems (TODS)
Differential files: their application to the maintenance of large databases
ACM Transactions on Database Systems (TODS)
Calculating constraints on relational expression
ACM Transactions on Database Systems (TODS)
Principles of Database Systems
Principles of Database Systems
Universality of data retrieval languages
POPL '79 Proceedings of the 6th ACM SIGACT-SIGPLAN symposium on Principles of programming languages
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PEIRCE is an interactive relational database management system intended for mini and microcomputers, with an extensible command facility, QUERY, based on Codd's relational algebra and supporting a clerk oriented interface. PEIRCE contains three major independent on-line modules: DBA, QUERY, and CSU. DBA provides the data definition and data dictionary facilities and is discussed in Section 2. QUERY provides both a relational algebra data manipulation language and a clerk oriented interface. QUERY is also discussed in Section 2. Command sequences are discussed in Section 3. We discuss the virtual file facilities of PEIRCE (which include the updating of virtual files) in Section 4. The underlying storage structure, namely entry order sequence with secondary indexes, was chosen primarily with simplicity of recovery in mind and is discussed in section 5. In Section 6 we discuss the control commands IF and FOR, which help to conveniently avoid having a host language facility. We conclude in Section 7 by describing further work planned on PEIRCE.