Top 10 Enterprise Database Systems to Consider How far back does your knowledge of databases go -- late-1980s, mid-1990s, five years ago? If so, you might not recognize some of the old timers in this list. You'll also do a double take if you didn't know many of them have their roots in the mid-to-late 1970s. It's also highly competitive, and enterprise database systems come packed with features from hot backups to high-availability. Here is a shortcut to the research you need to determine which solution is best for you. 1. Oracle began its journey in 1979 as the first commercially available relational database management system (RDBMS). 2. Say what you will about Microsoft and its interesting collection of officers. Big Blue puts the big into data centers with DB2. 4. Sybase is still a major force in the enterprise market after 25 years of success and improvements to its Adaptive Server Enterprise product. 5. MySQL began as a niche database system for developers but grew into a major contender in the enterprise database market. 6.
Open Journal of Databases Open Journal of Databases (OJDB) provides a platform for researchers and practitioners of databases to share their ideas, experiences and research results. OJDB publishes following four types of scientific articles: Short communications: reporting novel research ideas. The work represented should be technically sound and significantly advancing the state of the art. Short communications also include exploratory studies and methodological articles.Regular research papers: being full original findings with adequate experimental research. OJDB welcomes scientific papers in all the traditional and emerging areas of database research. Topics relevant to this journal include, but are NOT limited to:
Popular Database Management Systems Overview One of the most influential and widely spread open source database applications that manipulates large databases and can be accessed over the Web is MySQL database server. MySQL runs as a service providing multiple user access to several databases. MySQL is popular for web applications and operates with the database elements for the platforms (Linux/BSD/Mac/Windows). MySQL popularity for use with web applications is closely associated to the popularity of PHP programming language which is often used along with MySQL. Find more information about MySQL Export and Import Microsoft SQL Server designed to create web, enterprise, and desktop database systems. MS SQL Server allows you to store large amount of data which handles components like video, photographs, numbers, text, and much more. More information about MS SQL Server Export and Import Microsoft Office Access combines software development tools and the relational Microsoft Jet Database Engine with easy-to-use GUI.
Doc Center : Conceptos básicos de bases de datos Una base de datos es un conjunto de información organizada de manera que pueda ser utilizada eficientemente. Un directorio telefónico, un diccionario, un calendario o un libro de recetas son ejemplos de bases de datos. La información en una base está organizada en forma de registros. Cada registro contiene toda la información sobre una persona o un elemento de la base. Cada registro contiene campos. El nombre de un campo generalmente identifica la información almacenada en el campo. El conjunto de registros que utilizan los mismos campos conforma una tabla. 4D puede reorganizar los registros y realizar cálculos con la información para hacerla mucho más útil. 4D permite crear desde 1 hasta 32 767 tablas por base de datos. Algunas bases de datos tienen una tabla única. En el ejemplo anterior, el registro de cada uno de los empleados almacena el mismo tipo de datos. Una base de datos que guarda información sobre empleados y empresas es un buen ejemplo.
What is database Main » TERM » D » By Vangie Beal (1) Often abbreviated DB, a database is basically a collection of information organized in such a way that a computer program can quickly select desired pieces of data. Traditional databases are organized by fields, records, and files. An alternative concept in database design is known as Hypertext. To access information from a database, you need a database management system (DBMS). (2) Increasingly, the term database is used as shorthand for database management system.
STRUCTURE OF DBMS DBMS (Database Management System) acts as an interface between the user and the database. The user requests the DBMS to perform various operations (insert, delete, update and retrieval) on the database. The components of DBMS perform these requested operations on the database and provide necessary data to the users. The various components of DBMS are shown below: - Fig. 2.1 Structure Of DBMS 1. 2. 3. The Functions Of Data Manager Are: – • Convert operations in user's Queries coming from the application programs or combination of DML Compiler and Query optimizer which is known as Query Processor from user's logical view to physical file system. • Controls DBMS information access that is stored on disk. • It also controls handling buffers in main memory. • It also enforces constraints to maintain consistency and integrity of the data. • It also synchronizes the simultaneous operations performed by the concurrent users. • It also controls the backup and recovery operations. 4. 5. 6. 7.
Main Phases of Database Design In the picture below there are the main phases of database design. Database design is connected with application design. The requirements and the collection analysis phase produce both data requirements and functional requirements. The data requirements are used as a source of database design. The data requirements should be specified in as detailed and complete form as possible. In parallel with specifying the data requirements, it is useful to specify the known functional requirements of the application. Note that some phases are database management system independent and some are dependent. Conceptual Design Once all the requirements have been collected and analyzed, the next step is to create a conceptual shema for the database, using a high level conceptual data model. The result of this phase is an Entity-Relationship (ER) diagram or UML class diagram. There are several notations to draw the ER diagram. Logical Design To create the relation shemas is quite a mechanical operation.
Editions MySQL is the world's most popular open source database. Whether you are a fast growing web property, technology ISV or large enterprise, MySQL can cost-effectively help you deliver high performance, scalable database applications. MySQL Community Edition is the freely downloadable version of the world's most popular open source database. Commercial customers have the flexibility of choosing from multiple editions to meet specific business and technical requirements: ISVs, OEMs and VARs can learn more about MySQL as an Embedded Database 1 Features only available in Commercial Editions. 2 Annual Subscription: is defined as the right to use the specified program(s) in accordance with the applicable license metric and to receive Oracle Software Update License & Support for the specified program(s) for the term specified on the order. 3 Oracle Premier Support for MySQL is included in Annual Subscriptions (no extra cost) 4 Server: is defined as the computer on which the programs are installed.