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What are the requirements that two relations must satisfy in order to be considered union compatible in a database?
Wiki User
∙ 13y ago
When two or more rows share the same number of columns, and when their corresponding columns share the same (or compatible) domains, they are said to be union-compatible.
Wiki User
∙ 13y ago
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What is the difference between cardinality and degree of relationship in relations in database management?
bal amar
What is an example of an access relational database?
There is no such thing as an 'Access' Relational Database.A Relational Database Management System is one that has been built to deliver the requirements set out by Edgar Codd in 1970 such that the functions provided by the software conform to relational algebra. This means that the validity actions of the database management system over the data contained in it can be modeled and proved on a mathematical basis.Oracle, DB2, SQL Server, MySQL, etc. all implement most of the requirements of Codd's paper.It is worth noting that the relational model is the ONLYone where the affects of putting data in it can be proven.
Is it possible to perform a calculation within a database?
Yes you can. You can create queries that do calculations. You can write code for programs to do calculations in a database. Doing calculations is a significant element of what you do with a database, so yes you can do them within a database.
What is each row called in a database?
In database the data is stored in tables called database tables. These tables have rows and columns. Each row is called a tuple.
What is the primary key field of a database?
its a unique key use to identify data in database
How do you setup a database on a server?
Each database comes with documentation. In the beginning chapter of the documentation states the Operating System/Server requirements of that database software. There has to be enough memory, space and has to be compatible. All this information is listed in detail in the documentation. If the server requirements are met, then the next section will walk you through installing and configuring the database. Later chapters go into how to administer the database.
What are the key hardware factors needed to be considered when implementing an Database Management System?
Each database lists the hardware requirements in their install guide.
What database applications must be compatible with the?
operating system
What are the benefits of using a Relational Database?
Relational databases offer structured data storage, data integrity through constraints like foreign keys, efficient querying using SQL, and support for complex data relationships through normalization.
What is the primary deliverable from logical database design?
normalized relations
Role of high-level data model in the database design process?
A high level data model serves the database designer by providing a conceptual framework in which to specify, in a systematic fashion, what the data requirements of the database users are, and how the database will be structured to fulfill these requirements.
Determination of database requirements is part of this process?
System Analysis.
What are the primary duties of a remote database administrator?
A database administrator's responsibilities can include the following tasks: future storage requirements for the database system. Creating primary database and the database tools and applications are executed on remote computers.
What games are compatible with Windows 7?
Thousands of games are compatible with Windows 7; it would be impossible to provide a full list. Microsoft has a database of compatible applications that can be found in the Rleated Links section below.
What is mean by schema partition?
Different relations within the database are placed on separate disk.
What is the difference between cardinality and degree of relationship in relations in database management?
bal amar
What are the requirements of operating system for database management system?
A Database Management System ( DBMS ) is a set of computer programs that controls the creation, maintenance, and the use of a database. It allows organizations to place control of database develop.
