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The key difference between foreign key and primary key is that foreign key is a column or a set of columns that refer to a primary key or a candidate key of another table while primary key is a column or a set of columns that can be used to uniquely identify a row in […]
KDD vs Data mining KDD (Knowledge Discovery in Databases) is a field of computer science, which includes the tools and theories to help humans in extracting useful and previously unknown information (i.e. knowledge) from large collections of digitized data. KDD consists of several steps, and Data Mining is one of them. Data Mining is application […]
主键和惟一键列或一组umns, which can be used to identify or access a row or a set of rows in a database is called a key. A unique key is a key that can uniquely identify a row in a table in the context of relational databases. […]
Explicit Cursor vs Implicit Cursor When it comes to databases, a cursor is a control structure that allows traversing over the records in a database. A cursor provides a mechanism to assign a name to a SQL select statement and then it can be used to manipulate the information within that SQL statement. Implicit cursors […]
DBMS vs Data Warehouse DBMS (Database Management System) is the whole system used for managing digital databases, which allows storage of database content, creation/maintenance of data, search and other functionalities. A data warehouse is a place that stores data for archival, analysis and security purposes. A data warehouse is made up of a single computer […]
data centre vs NOC Data center and NOC are integral part of computer industry. Data center is the establishment that stores servers and telecommunication components. Data center also controls the services like air conditioning, security of the system and suppression of fire. NOC is acronym for Network Operations Center and it is the epicenter from where […]
RDBMS vs ORDBMS A Relational Database Management System (RDBMS) is a Database Management System (DBMS) that is based on the relational model. Most popular DBMSs currently in use are RDMSs. Object-Relational database (ORDBMS) is also a DBMS that extends RDBMS to support a broader class of applications and attempts to create a bridge between relational […]
RDBMS vs OODBMS An Object-Oriented Database Management System (OODBMS), sometimes referred as Object Database Management System (ODMS) is a Database Management System (DBMS) that supports modeling and creation of data as objects. OODBMS provides support for object classes, class property and method inheritance by sub classes and their objects. A Relational Database Management System (RDBMS) […]
DBMS vs File System DBMS (Database Management System) and File System are two ways that could be used to manage, store, retrieve and manipulate data. A File System is a collection of raw data files stored in the hard-drive whereas DBMS is a bundle of applications that is dedicated for managing data stored in databases. […]
DBMS vs Database A system intended for easily organizing, storing and retrieving large amounts of data, is called a database. In other words, a database holds a bundle of organized data (typically in digital form) for one or more users. Databases, often abbreviated DB, are classified according to their content, such as document-text, bibliographic and […]
