[1] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

sql
     structured query language iso 9075, db, 4gl
     
     

[2] : The Free On-line Dictionary of Computing (27 SEP 03)

sql
     
         /s q l/ an industry-standard
        language for creating, updating and, querying relational
        database management systems.
     
        sql was developed by ibm in the 1970s for use in system r.
        it is the de facto standard as well as being an iso and
        ansi standard.  it is often embedded in general purpose
        programming languages.
     
        the first sql standard, in 1986, provided basic language
        constructs for defining and manipulating tables of data; a
        revision in 1989 added language extensions for referential
        integrity and generalised integrity constraints.  another
        revision in 1992 provided facilities for schema manipulation
        and data administration, as well as substantial enhancements
        for data definition and data manipulation.
     
        development is currently underway to enhance sql into a
        computationally complete language for the definition and
        management of persistent, complex objects.  this includes:
        generalisation and specialisation hierarchies, multiple
        inheritance, user defined data types, triggers and
        assertions, support for knowledge based systems,
        recursive query expressions, and additional data
        administration tools.  it also includes the specification of
        abstract data types adts, object identifiers, methods,
        inheritance, polymorphism, encapsulation, and all of the
        other facilities normally associated with object data
        management.
     
        the emerging sql3 standard is expected to be complete in
        1998.
     
        according to allen g. taylor, sql does _not_ stand for
        "structured query language".  that, like "sequel" and its
        pronunciation /see'kwl/, was just another unofficial name
        for a precursor of sql.  however, the ibm sql reference manual
        for db2 and craig mullins's "db2 developer's guide" say sql
        _does_ stand for "structured query language".
     
        sql standards http://www.jcc.com/sql_stnd.html.
     
        an sql parser
        ftp://ftp.uu.net/published/oreilly/nutshell/lexyacc/ is
        described in "lex  yacc", by levine, mason  brown published
        by o'reilly.
     
        the 1995 sql reunion: people, projects, and politics
        http://www.mcjones.org/system_r/sql_reunion_95/.
     
        "a guide to the sql standard", c.j. date, a-w 1987.
     
        "sql for dummies", allen g. taylor, idg books worldwide.
     
        2000-07-07
     
     
see also:
relational database management systems ibm system r de facto standard iso ansi 
standard tables referential integrity integrity constraints 
schema data administration persistent multiple inheritance data types 
triggers assertions knowledge based systems recursive query expressions abstract data types 
methods inheritance polymorphism encapsulation sql3 
lt;sql standardsgt; lt;an sql parsergt; lt;the 1995 sql reunion: people, projects, and politicsgt; 

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