Basic HTML version of Foils prepared 7 October 97

Foil 10 Structure Query Language (SQL) - I

From untitled presentation ARL Database Tutorial -- February 98. by Gang Cheng, C.W. Ou, Geoffrey C. Fox


1 A database language specifies the semantics of various components of a DBMS: structures and operation of a data model, data definition, data access, security, programming language interface, and data administration
2 Industry accepted Standard, first introduced by ANSI in 1986, current SQL92 by ANSI and ISO, new standard SQL3 with enhancements in object-oriented data management is undergoing
3 Portable to all RDBMS systems
4 Built on relational model, simple and powerful
5 Non-procedure language, only specify "what-to-do", not "how-to-do" (4GL)
6 Extended to object-oriented programming interface
  • This extended model competes with fledging object-oriented database in industry

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