ISBL (Information Systems Base Language) is the
relational algebra
In database theory, relational algebra is a theory that uses algebraic structures with a well-founded semantics for modeling data, and defining queries on it. The theory was introduced by Edgar F. Codd.
The main application of relational algebr ...
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 a ...
, one of the earliest
database management systems to implement
E.F. Codd's relational model of data.
Example
OS = ORDERS * SUPPLIERS
LIST OS: NAME="Brooks" % SNAME, ITEM, PRICE
See also
*
IBM Business System 12
Business System 12, or simply BS12, was one of the first fully relational database management systems, designed and implemented by IBM's ''Bureau Service'' subsidiary at the company's international development centre in Uithoorn, Netherlands. ...
- 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 the early 1980s.
External links
Sample ISBL usage
Query languages
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