ISBL (Information Systems Base Language) is the
relational algebra
In database theory, relational algebra is a theory that uses algebraic structures for modeling data and defining queries on it with well founded semantics (computer science), semantics. The theory was introduced by Edgar F. Codd.
The main applica ...
notation that was invented for
PRTV
PRTV (''Peterlee Relational Test Vehicle'') was the world's first relational database management system that could handle significant data volumes.
It was a relational query system with powerful query facilities, but very limited update facility ...
, one of the earliest
database management system
In computing, a database is an organized collection of data or a type of data store based on the use of a database management system (DBMS), the software that interacts with end users, applications, and the database itself to capture and an ...
s to implement
E.F. Codd's relational model
The relational model (RM) is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by English computer scientist Edgar F. Codd, where all data are represented in terms of t ...
of data.
Example
OS = ORDERS * SUPPLIERS
LIST OS: NAME="Brooks" % SNAME, ITEM, PRICE
See also
*
IBM Business System 12 - An IBM industrial strength relational DBMS influenced by ISBL. It was developed for use by customers of IBM's time-sharing service bureaux in various countries in the early 1980s.
External links
Sample ISBL usage
Query languages
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