Definition of Errol

Errol may refer to:

• Errol, a male first name
• ERROL - Entity Relationship Role Oriented Language. A database language over the Entity-relationship model (ERM).
• Errol Flynn, a famous actor in the 1930s, 1940s and 1950s
  • "Errol", a song in honour of Flynn, on rock band Australian Crawl's album Sirocco
• Erol (also spelt Errol), the name of a character from the Jak and Daxter video game series
• Errol Barnett, an anchor for Channel One News
• Errol Etienne, a prominent Scottish artist
• Errol (Harry Potter), the Weasley family's owl in the fictional Harry Potter series
• Errol Morris, an Academy Award winning documentary film director.
• Errol (15 Storeys High), a character in the British sitcom 15 Storeys High.
• Errol, Perth and Kinross, a village in Perth and Kinross, Scotland
• Errol, New Hampshire, a town in the U.S. state of New Hampshire

ERROL - Entity Relationship Role Oriented Language, is a declarative database query and manipulation language for the Entity-relationship model (ERM). It is applicable to any data model on which ERM can be mapped, virtually any general purpose database data model. It is based on the capability of ER diagrams to be described accurately by simple Natural language (NL) sentences. A specification of a complex operation upon an ERM database can be described accurately by a complex and/or compound NL sentence constructed from the simple sentences describing the respective ER diagram. An ERROL expression mimics such NL sentence with one-to-one correspondence between ERROL subexpressions and NL subsentences: An ERROL expression can look like the corresponding NL sentence, or at least like a similar, equivalent one. This allows to write in ERROL very complex queries by simple conversion from their NL specifications. This also allows a straightforward checking of an ERROL expression meeting a complex NL specification.