Concepts inA data base sublanguage founded on the relational calculus

Relational calculus

Relational calculus consists of two calculi, the tuple relational calculus and the domain relational calculus, that are part of the relational model for databases and provide a declarative way to specify database queries. This in contrast to the relational algebra which is also part of the relational model but provides a more procedural way for specifying queries.  more from Wikipedia

Database

A database is an organized collection of data, today typically in digital form. The data are typically organized to model relevant aspects of reality (for example, the availability of rooms in hotels), in a way that supports processes requiring this information (for example, finding a hotel with vacancies). The term database is correctly applied to the data and their supporting data structures, and not to the database management system (DBMS).  more from Wikipedia

Sublanguage

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Procedural programming

Procedural programming can sometimes be used as a synonym for imperative programming (specifying the steps the program must take to reach the desired state), but can also refer (as in this article) to a programming paradigm, derived from structured programming, based upon the concept of the procedure call.  more from Wikipedia

Algebra

Algebra (from Arabic al-jebr meaning "reunion of broken parts") is the branch of mathematics concerning the study of the rules of operations and relations, and the constructions and concepts arising from them, including terms, polynomials, equations and algebraic structures. Together with geometry, analysis, topology, combinatorics, and number theory, algebra is one of the main branches of pure mathematics.  more from Wikipedia

MIT Computer Science and Artificial Intelligence Laboratory

MIT Computer Science and Artificial Intelligence Laboratory (also CSAIL) is a research laboratory at the Massachusetts Institute of Technology formed by the 2003 merger of the Laboratory for Computer Science and Artificial Intelligence Laboratory. Housed within the Stata Center, CSAIL is the largest on-campus laboratory as measured by research scope and membership.  more from Wikipedia

Standardization

Standardization orStandardisation is the process of developing and implementing technical standards. The goals of standardization can be to help with independence of single suppliers, compatibility, interoperability, safety, repeatability, or quality. In social sciences, including economics, the idea of standardization is close to the solution for a coordination problem, a situation in which all parties can realize mutual gains, but only by making mutually consistent decisions.  more from Wikipedia