what are the components of database system?
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Go here...\nhttp://en.wikipedia.org/wiki/Database
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Business database software. Similar to Oracle. Originally from Germany.
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fundamental of database designs - ramez elmasri & shamkant b. navathe
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A distributed database system allows applications to access data from local and remote databases. In a homogenous distributed system, each database is an Oracle database. In a heterogeneous distributed system, at least one of the databases is a non-Oracle database. Distributed databases use a client/server architecture to process information requests. \n\nAn Oracle distributed database system can incorporate Oracle databases of different versions. All supported releases of Oracle can participate in a distributed database system. Nevertheless, the applications that work with the distributed database must understand the functionality that is available at each node in the system--for example, a distributed database application cannot expect an Oracle7 database to understand the object SQL extensions that are only available with Oracle8i. \n\nDistributed Databases Vs. Distributed Processing\nThe terms distributed database and distributed processing are closely related, yet have distinct meanings. \n\nDistributed database \n A set of databases in a distributed system that can appear to applications as a single data source.  \n \nDistributed processing \n The operations that occurs when an application distributes its tasks among different computers in a network. For example, a database application typically distributes front-end presentation tasks to client computers and allows a back-end database server to manage shared access to a database. Consequently, a distributed database application processing system is more commonly referred to as a client/server database application system. \n \n \n\n\nOracle distributed database systems employ a distributed processing architecture. For example, an Oracle database server acts as a client when it requests data that another Oracle database server manages. \n\nDistributed Databases Vs. Replicated Databases\nThe terms distributed database system and database replication are related, yet distinct. In a pure (that is, non-replicated) distributed database, the system manages a single copy of all data and supporting database objects. Typically, distributed database applications use distributed transactions to access both local and remote data and modify the global database in real-time.
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Database Driven System - All aspects of your online store can be database driven, allowing your website to update itself and for you to update it as often as you wish.\n\n\nCustomised Shopping Cart - Running Rock's top shopping cart program tailored exactly to match the feel of your website design and your products.\n\n\nUnlimited Products & Categories - We don't limit the number of products or categories you can have on your website.\n\n\nAutomatic Thumbnail Photos - Our software offers you automatic thumbnail creation of your products at any size and on any page you wish.\n\n\nUser Login - Your database can hold as much information on your customers as you wish, including a username and password allowing them to access members only areas of your website.\n\n\nExisting System Integration - If you have an existing database or back end system we can integrate your e-commerce website to work seamlessly with it.
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The main database vendors in Microsoft, Oracle and IBM all now have a free express version of the database that can be downloaded and installed on a windows desktop.  I suggest you download and try it out for yourself.  It is difficult to get an independant opinion on the difference between each database as people will prefer the ones they are familiar with.\n\nAll three database types have relational tables, a simple SQL language, common objects such as procedures, indexes and triggers.  \n\nSQL Server used to be easier to install and administer but over time the three express versions are becoming easier to run so it is hard to seperate them.
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Oracle\nDb2\nSQL Server \nSybase\nNCR Tera data/ PostGres\n\n\nand then you have MySQL too
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Hardware includes,\n1. Input\n2. Process\n3. Storage\n4. Output\nInput includes, mouse, keyboard,scanner,\nProcess includes, Microprocessor\nStorage includes hard disk, floppy\noutput includes, monitor, printer, speaker
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You get database libraries for the 'C' language. For eg. SQL server has such a library, you can find some examples also. You can use standard API like ODBC, JDBC also.
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you must have the 2 systems networked, with a data connection established (typically ODBC), and authentication setup. (with the database already setup)
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See the source. It has Database, Programming, IT Management, Networking, Software engineering, etc..\n\nEnjoy itt. :D:D
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In any DBMS, the data which you input will be stored in the form of records(rows). Its easier in this way to track down a particular record that you are looking for in the DBMS with the help of the Index which will be created in the database, 'coz of which time consumption will be less.\nHope this will help you.
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Database administration involves taking care of the systems on which databases run.  This includes everything from arranging regular backups to adjusting the systems to maximize performance.\n\nBeing a good DBA requires an intimate knowledge of both the database software and the operating system on which it runs.
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A database is an organized collection of data. The term originated within the computer industry, but its meaning has been broadened by popular use, to the extent that the European Database Directive (which creates intellectual property rights for databases) includes non-electronic databases within its definition. This article is confined to a more technical use of the term; though even amongst computing professionals, some attach a much wider meaning to the word than others.\n\nOne possible definition is that a database is a collection of records stored in a computer in a systematic way, such that a computer program can consult it to answer questions. For better retrieval and sorting, each record is usually organized as a set of data elements (facts). The items retrieved in answer to queries become information that can be used to make decisions. The computer program used to manage and query a database is known as a database management system (DBMS). The properties and design of database systems are included in the study of information science.
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If what you are asking is what you can use to store and manage data (don't know about the 'buy' part) I can take a stab at it. \n\nI am a software engineer that has been writing database applications for 13 years. What I have used are:\nMicrosoft Access (http://office.microsoft.com/en-us/access/default.aspx)\nMySQL (an Open Source, free database) (http://www.mysql.com/)\nMicrosoft SQL Server (http://www.microsoft.com/sql/default.mspx) and \nOracle (http://www.oracle.com/index.html).  \n\nThese are pretty much the viable solutions depending on the application. MS Access is more of a poor-mans solution but certainly capable of handling 100's of thousands of rows of data, MySQL is a bit more complex but has evolved and even has a User Interface to manage the database now and fairly capable in terms of it's data capacity. SQL Server/Oracle are the full-blown Database Management Systems (DBMS) that cost the big bucks to license but are what large enterprises/web sites use to hold all their data.\n\nHope this helps.
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In short, the master database holds all the information about the other databases on the server, and it is absolutely essential.  A corrupted or missing master database will kill SQL.  Also, the master db can hold information like stored procedures that become globally available to all databases on the system.
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1. Field\n2. Retrieval\n3. Flat File\n4. Record\n5. DBMS\n6. Query\n7. Updating\n\nHope that helps!!