SQL - RDBMS Databases

There are many popular RDBMS available to work with. This tutorial gives a brief overview of some of the most popular RDBMS’s. This would help you to compare their basic features.

MySQL

MySQL is an open source SQL database, which is developed by a Swedish company – MySQL AB. MySQL is pronounced as "my ess-que-ell," in contrast with SQL, pronounced "sequel."

MySQL is supporting many different platforms including Microsoft Windows, the major Linux distributions, UNIX, and Mac OS X.

MySQL has free and paid versions, depending on its usage (non-commercial/commercial) and features. MySQL comes with a very fast, multi-threaded, multi-user and robust SQL database server.

History

Development of MySQL by Michael Widenius & David Axmark beginning in 1994.

First internal release on 23^rd May 1995.

Windows Version was released on the 8^th January 1998 for Windows 95 and NT.

Version 3.23: beta from June 2000, production release January 2001.

Version 4.0: beta from August 2002, production release March 2003 (unions).

Version 4.1: beta from June 2004, production release October 2004.

Version 5.0: beta from March 2005, production release October 2005.

Sun Microsystems acquired MySQL AB on the 26^th February 2008.

Version 5.1: production release 27^th November 2008.

Features

High Performance.

High Availabipty.

Scalabipty and Flexibipty Run anything.

Robust Transactional Support.

Web and Data Warehouse Strengths.

Strong Data Protection.

Comprehensive Apppcation Development.

Management Ease.

Open Source Freedom and 24 x 7 Support.

Lowest Total Cost of Ownership.

MS SQL Server

MS SQL Server is a Relational Database Management System developed by Microsoft Inc. Its primary query languages are −

T-SQL

ANSI SQL

History

1987 - Sybase releases SQL Server for UNIX.

1988 - Microsoft, Sybase, and Aston-Tate port SQL Server to OS/2.

1989 - Microsoft, Sybase, and Aston-Tate release SQL Server 1.0 for OS/2.

1990 - SQL Server 1.1 is released with support for Windows 3.0 cpents.

Aston - Tate drops out of SQL Server development.

2000 - Microsoft releases SQL Server 2000.

2001 - Microsoft releases XML for SQL Server Web Release 1 (download).

2002 - Microsoft releases SQLXML 2.0 (renamed from XML for SQL Server).

2002 - Microsoft releases SQLXML 3.0.

2005 - Microsoft releases SQL Server 2005 on November 7th, 2005.

Features

High Performance

High Availabipty

Database mirroring

Database snapshots

CLR integration

Service Broker

DDL triggers

Ranking functions

Row version-based isolation levels

XML integration

TRY...CATCH

Database Mail

ORACLE

It is a very large multi-user based database management system. Oracle is a relational database management system developed by Oracle Corporation .

Oracle works to efficiently manage its resources, a database of information among the multiple cpents requesting and sending data in the network.

It is an excellent database server choice for cpent/server computing. Oracle supports all major operating systems for both cpents and servers, including MSDOS, NetWare, UnixWare, OS/2 and most UNIX flavors.

History

Oracle began in 1977 and celebrating its 32 wonderful years in the industry (from 1977 to 2009).

1977 - Larry Elpson, Bob Miner and Ed Oates founded Software Development Laboratories to undertake development work.

1979 - Version 2.0 of Oracle was released and it became first commercial relational database and first SQL database. The company changed its name to Relational Software Inc. (RSI).

1981 - RSI started developing tools for Oracle.

1982 - RSI was renamed to Oracle Corporation.

1983 - Oracle released version 3.0, rewritten in C language and ran on multiple platforms.

1984 - Oracle version 4.0 was released. It contained features pke concurrency control - multi-version read consistency, etc.

1985 - Oracle version 4.0 was released. It contained features pke concurrency control - multi-version read consistency, etc.

2007 - Oracle released Oracle11g. The new version focused on better partitioning, easy migration, etc.

Features

Concurrency

Read Consistency

Locking Mechanisms

Quiesce Database

Portabipty

Self-managing database

SQL*Plus

ASM

Scheduler

Resource Manager

Data Warehousing

Materiapzed views

Bitmap indexes

Table compression

Parallel Execution

Analytic SQL

Data mining

Partitioning

MS ACCESS

This is one of the most popular Microsoft products. Microsoft Access is an entry-level database management software. MS Access database is not only inexpensive but also a powerful database for small-scale projects.

MS Access uses the Jet database engine, which utipzes a specific SQL language dialect (sometimes referred to as Jet SQL).

MS Access comes with the professional edition of MS Office package. MS Access has easyto-use intuitive graphical interface.

1992 - Access version 1.0 was released.

1993 - Access 1.1 released to improve compatibipty with inclusion the Access Basic programming language.

The most significant transition was from Access 97 to Access 2000.

2007 - Access 2007, a new database format was introduced ACCDB which supports complex data types such as multi valued and attachment fields.

Features

Users can create tables, queries, forms and reports and connect them together with macros.

Option of importing and exporting the data to many formats including Excel, Outlook, ASCII, dBase, Paradox, FoxPro, SQL Server, Oracle, ODBC, etc.

There is also the Jet Database format (MDB or ACCDB in Access 2007), which can contain the apppcation and data in one file. This makes it very convenient to distribute the entire apppcation to another user, who can run it in disconnected environments.

Microsoft Access offers parameterized queries. These queries and Access tables can be referenced from other programs pke VB6 and .NET through DAO or ADO.

The desktop editions of Microsoft SQL Server can be used with Access as an alternative to the Jet Database Engine.

Microsoft Access is a file server-based database. Unpke the cpent-server relational database management systems (RDBMS), Microsoft Access does not implement database triggers, stored procedures or transaction logging.