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1 What are object-oriented databases and how do they differ from relational databases?
First of all, they may or may not differ. An object oriented database is a database you program by the use of small pieces, that, put together form an object. These objects can then be combined with other objects and/or be used separately. Actually, if you where to remove 'on leg' of the database that leg should be able to stand on its own. So goes the therory anyway. One relational database that has some benefits as an object oriented database is 4D. However, the stuff that one 'leg' can entirly support itself isn't actually true, however the objects are there and they do make a lot of sense. Am I making sense? --
What else can I help you with?
What are the 2 major types of databases?
The two major types of databases are relational databases and non-relational databases. Relational databases store data in tables with predefined relationships, while non-relational databases use flexible data models like key-value pairs, documents, graphs, or columns.
Why is it better to use a relational database instead of a flat file database?
Relational database has many advantages over the flat file database: 1. Avoids data duplication. 2. Avoids inconsistent records. 3. Easier to change data. 4. Easier to change data format. 5. Data can be added and removed easily. 6. Easier to maintain security.
Example of relational statements in C programming?
You mean relational operators?if (argc
What are the different types of the DBMS with the advantages and disadvantages?
Advantages of database system: 1) improved data sharing 2) improved data integrity 3) reduced data redundancy 4) improved data access Dis advantages of database system: 1) increased cost 2) managing complexity 3) maintaining currency
What are the different types of management systems?
1. relational database management system(RDBMS) 2. object Rdbms. 1. relational database management system(RDBMS) 2. object Rdbms.
What are the main differences between relational algebra and relational calculus?
Relation algebra is a procedural language where relation calculus is non-procedural languageRelational algebra, an offshoot of first-orderlogic (and of algebra of sets), deals with a set of finitaryrelations (see also relation (database)) which is closed under certain operators. These operators operate on one or more relations to yield a relation. Relational algebra is a part of computer science.Relational calculus consists of two calculi, the tuplerelational calculus and the domain relational calculus, that are part of the relational model for databases and provide a declarative way to specify database queries. This in contrast to the relational algebra which is also part of the relational model but provides a more procedural way for specifying queries.The relational algebra might suggest these steps to retrieve the phone numbers and names of book stores that supply Some Sample Book:1. Join books and titles over the BookstoreID.2. Restrict the result of that join to tuplesfor the book Some Sample Book.3. Project the result of that restriction over StoreNameand StorePhone.The relational calculus would formulate a descriptive, declarative way:Get StoreNameand StorePhonefor supplies such that there exists a title BK with the same BookstoreIDvalue and with a BookTitlevalue of Some Sample Book.The relational algebra and the relational calculus are essentially logically equivalent: for any algebraic expression, there is an equivalent expression in the calculus, and vice versa.This result is known as Codd'stheorem
What are the types of database?
There are three database models. The three database models are as follows : 1) relational 2) network data 3) hierarchical
Which normal form is considered adequate for normal relational database design?
1 NF
Major difference between dbms vs rdbms?
A DBMS (Database Management System) is a software that manages databases and provides functionalities to store, retrieve, and update data. An RDBMS (Relational Database Management System) is a type of DBMS that stores data in a structured way using tables with relationships between them. RDBMS enforces the relational model, which allows for data integrity through constraints and supports SQL for querying data.
Different types of SQL?
SQL is Structured Query Language is a database computer language designed for managing data in relational database management systems (RDBMS).PostgreSQL is an object-relational database management system (ORDBMS).[1] It is released under a BSD-style license and is thus free software. As with many other open-source programs, PostgreSQL is not controlled by any single company, but has a global community of developers and companies to develop it.SQLite is an ACID-compliant embedded relational database management system contained in a relatively small (~225 KB[1]) C programming library. The source code for SQLite is in the public domain.MySQL (pronounced /maɪˌɛskjuːˈɛl/[1] My S-Q-L, or "My sequel" /maɪˈsiːkwəl/) is a relational database management system (RDBMS)[2] which has more than 6 million installations. [3] MySQL stands for "My Structured Query Language". The program runs as a server providing multi-user access to a number of databases.
In a relational schema each tuple is divided into fields called?
In a relational schema, each tuple is divided into fields called attributes. Each attribute corresponds to a specific piece of data within the tuple.
How many types of databases?
There are three kind of database mainly . First is network database it which we consider data is linked to other data by the means of some link.Second is object oriented database, that helps to include features like abstraction, encapsulation etc.Third is Hierarchical database , that follows a simple sequence or hierarchy of data , there are nodes and a main root.
