SQL in a Nutshell, 2nd Edition [Electronic resources] نسخه متنی

Chapter 1. SQL History and Implementations

In the early 1970s, the seminal work of IBM research fellow Dr. E.
F. Codd led to the development of a relational data model product
called SEQUEL, or Structured English Query
Language. SEQUEL ultimately became SQL, or Structured Query
Language.

IBM, along with other relational database vendors, wanted a
standardized method for accessing and manipulating data in a
relational database. Although IBM was first to develop relational
database theory, Oracle was first to market with the technology. Over
time, SQL proved popular enough in the marketplace to attract the
attention of the American National Standards Institute (ANSI), which
released standards for SQL in 1986, 1989, 1992, 1999, and 2003. Since
1986, competing languages have allowed programmers and developers to
access and manipulate relational data. However, few were as easy to
learn or as universally accepted as SQL. Programmers and
administrators now have the benefit of learning a single language
that, with minor adjustments, is applicable to a wide variety of
database platforms, applications, and products.

SQL in a Nutshell, Second Edition, describes
five common implementations of SQL2003:

IBM's DB2 Universal Database Version 8 for Linux,
Unix, and Windows

MySQL Version 4

Oracle Database 10g

PostgreSQL Version 7

Microsoft's SQL Server 2000

We also cover Sybase Adaptive Server Enterprise (ASE), but to a
lesser degree, in

Appendix B.