INTRODUCTION SQL

More than 10 years ago, the biggest factor in the performance of a business application is the speed of the SQL it runs. It took me longer to realize just how much room for improvement typically lies in that SQL. The SQL that most affects the load on a system and the productivity of its end users can usually be improved by a large factor. In the 1970s, IBM developed a product called SEQUEL, or Structured English Query Language, which ultimately became SQL, the Structured Query Language.

IBM, along with other relational database vendors, wanted a standardized method

for accessing and manipulating data in a relational database. Over the decades,

many competing languages have allowed programmers and developers to access

and manipulate data. However, few have been as easy to learn and as universally

accepted as SQL. Programmers and developers now have the benefit of learning a

language that, with minor adjustments, is applicable to a wide variety of database

applications and products. SQL in a Nutshell describes four implementations of the current SQL standard, SQL99 (also known as SQL3): Microsoft’s SQL Server, MySQL, Oracle, and SQL. For those migrating from implementations of the earlier SQL standard,

The Relational Database Model Relational Database Management Systems (RDBMSs), such as SQL Server and Oracle, are the primary engines of information systems worldwide, particularly Internet/Intranet applications and distributed client/server computing systems.

An RDBMS is defined as a system whose users view data as a collection of tables

related to each other through common data values. Data is stored in tables, and

tables are composed of rows and columns. Tables of independent data can be

linked (or related) to one another if they each have columns of data (called keys)

that represent the same data value. This concept is so common as to seem trivial;

however, it was not so long ago that achieving and programming a system capable

of sustaining the relational model was considered a long shot that would have

limited usefulness.

This site is designed to help BCA MCA student to develop final project and synopsis Download Free BCA Project, MCA Project, IT Projects, Final report and Project synopsis with Full documentation and code

Free download MCA projects in ASP.NET with complete source code, Free download MCA projects in VB,NET with complete source code, Free download MCA MSc projects in C#.net with complete source code,

Free download MCA projects in JAVA with complete source code, Free download MCA projects in PHP with complete source code, Free download BSc CS IT projects in PHP,JAVA, ASP.NET with source code

Computer Science Final Project , Free download MCA projects in asp.net , Free download MCA projects in vb.net, Free download MCA projects in C#.net, Free download MCA projects in java, Free download MCA projects in PHP