A DBMS is a software system that allows you to create and manage a database, check organization, storage, retrieval of data within a database, its security and integrity; is designed for multi-users, plays a key role in many computer applications (from accounting and the management of human strength, to network management or telephony). The functionality of a database depends essentially on its design: the correct identification of the objectives of the database tables and then to be defined through their fields, and relationships that bind them, allows a faster data extraction and management more efficient.
The DBMS is composed of a data model, ie a set of concepts used to organize data of interest and describe the structure so that it is comprehensible to a computer. Each data model provides mechanisms structuring, similar to the type constructors of programming languages, which allow you to define new data based on predefined elementary types. Attualmento the relational model of data is the most portable, allowing you to define types using the constructor report with which you can organize your data in record sets a fixed structure. The report is then usually represented in the table. The languages \u200b\u200bfor databases are divided into those languages \u200b\u200bthat define the Data Definition Language (DDL) and those that allow data manipulation Data Manipulation Language (DML). Some languages, such as SQL, have both characteristics. SQL is a language through the use of queries, questions and runs the database. It 's designed to read, modify and manage data stored in a system based on relational model, to create and edit Schima database and tools to create and manage and control access to data.
DB2 is IBM's relational DBMS, one of the first to use the SQL language. It 'an object-relational DBMS (in object-oriented programming, each "object" typically contains other. Ex: the object containing the student Marta Zappala will contain a reference to the "Qualification"). DB2 DBMS today is the first hybrid that combines the relational model, a technology that provides the ability to save info in fields of type XML allowing interrogation of databases with XQuery. IBM has released a free version of DB2 Express your dataserver, available for Linux, Mac OS, Windows .. has the same standard features of commercial versions, but uses a maximum of two CPUs and up to 2GB of ram independently of the hardware you have.
(INFORMIX RDBMS is now an IBM.)
Access is a relational database management system produced by Microsoft Office included in the package. It can be used in two ways: as manager of independent databases on a PC and an interface to other systems. The more widespread use and the best balance between performance / cost corresponds to a post addressed to desktop applications designed for LAN with less than ten users. Although in the end it is still much used as a Front-Editor to Database Server for multi-user applications to large.
Oracle is one of the most famous model-based relational DBMS (RDBMS) produced by Oracle Corporation. It 'a system of management of databases and has been written in C. The database engine can support a wide range of platforms (some platforms and Linux operating systems, Sun Solaris, Microsoft, IBM ..)
SQL Pico is the first Italian Open Source relational database, is produced by PicoSoft of Pisa. To download the software requires no registration. Its main features compared to competing products are compact, low memory usage and resources, and ease of installation and configuration. Despite this PicoSQL supports the SQL language with all its features and maintains high levels of competition, and transactions.
MySQL is a relational DBMS product from Oracle Corporation, included in the LAMP platform, which stands for Linux, Apache, MySQL, PHP. one of the most use to create dynamic Web sites and applications. Wikipedia sites are managed by the MediaWiki software that is based on a MySQL database.
SQLite is a software library written in C language Its creator has released into the public domain, making it usable without any restriction. SQLite allows you to create a database (including tables, queries, forms, reports) incorporated into a single file, as in the case of modules Microsoft Office Access and of OpenOffice.org Base. SQLite is not a standalone process used by itself, but it can be embedded within another program. (It is used in Mozilla Firefox to store bookmarks, browsing history and other information.)
DBMS. proprietary software.
DB2 is IBM's relational DBMS, one of the first to use the SQL language. It 'an object-relational DBMS (in object-oriented programming, each "object" typically contains other. Ex: the object containing the student Marta Zappala will contain a reference to the "Qualification"). DB2 DBMS today is the first hybrid that combines the relational model, a technology that provides the ability to save info in fields of type XML allowing interrogation of databases with XQuery. IBM has released a free version of DB2 Express your dataserver, available for Linux, Mac OS, Windows .. has the same standard features of commercial versions, but uses a maximum of two CPUs and up to 2GB of ram independently of the hardware you have. (INFORMIX RDBMS is now an IBM.)
Access is a relational database management system produced by Microsoft Office included in the package. It can be used in two ways: as manager of independent databases on a PC and an interface to other systems. The more widespread use and the best balance between performance / cost corresponds to a post addressed to desktop applications designed for LAN with less than ten users. Although in the end it is still much used as a Front-Editor to Database Server for multi-user applications to large.
Oracle is one of the most famous model-based relational DBMS (RDBMS) produced by Oracle Corporation. It 'a system of management of databases and has been written in C. The database engine can support a wide range of platforms (some platforms and Linux operating systems, Sun Solaris, Microsoft, IBM ..) DBMS. OPEN SOURCE.
SQL Pico is the first Italian Open Source relational database, is produced by PicoSoft of Pisa. To download the software requires no registration. Its main features compared to competing products are compact, low memory usage and resources, and ease of installation and configuration. Despite this PicoSQL supports the SQL language with all its features and maintains high levels of competition, and transactions.
MySQL is a relational DBMS product from Oracle Corporation, included in the LAMP platform, which stands for Linux, Apache, MySQL, PHP. one of the most use to create dynamic Web sites and applications. Wikipedia sites are managed by the MediaWiki software that is based on a MySQL database.
SQLite is a software library written in C language Its creator has released into the public domain, making it usable without any restriction. SQLite allows you to create a database (including tables, queries, forms, reports) incorporated into a single file, as in the case of modules Microsoft Office Access and of OpenOffice.org Base. SQLite is not a standalone process used by itself, but it can be embedded within another program. (It is used in Mozilla Firefox to store bookmarks, browsing history and other information.)