Database (DBMS) Storage Margaret Rouse Technology expert Margaret is an award-winning writer and educator known for her ability to explain complex technical topics to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of...
A relationship, in the context of databases, is a situation that exists between two relational database tables when one table has a foreign key that references the primary key of the other table. Relationships allow relational databases to split and store data in different tables, while linking ...
Hierarchical data model: Data is organized into a tree-like structure. Other data models include entity-relationship, record base, object-oriented, object relation, semi-structured, associative, context, and flat data models. Database system architecture in DBMS is categorized as either single tier,...
Hierarchical DBMS The Hierarchical Model was the first database management system model to be used in databases. This type of DBMS organizes data into a tree-like structure, which is useful for managing data with a parent-child relationship. It is characterized by its fast response times and ef...
The relationship can now be defined using aForeign Key. A foreign key is when the primary key column (or columns) for one table is stored again in another table. In this example the customer table is related to the order table. The relationship would be defined by adding a new column to...
Hierarchical DBMS The Hierarchical Model was the first database management system model to be used in databases. This type of DBMS organizes data into a tree-like structure, which is useful for managing data with a parent-child relationship. It is characterized by its fast response times and ef...
1.What is the relationship between management information systems (MIS) and information technology (IT)? ANSWER:MISis a broad business function and the study of the use of IT.ITis a set of tools and a resource within MIS. 2.What four steps should an organization follow in determining which ...
My Structured Query Language (MySQL) is a common open-source SQL relational database that performs all the basic SQL commands, such as writing and querying data. A reliable, stable, and secure database management system (DBMS), MySQL is widely adopted because it supports most leading programming...
The complex attribute in DBMS involves both multivalued and composite attributes. For example, someone might have more than one house, and each house might have more than one phone. The phone is then considered a complex attribute. In the example above, the phone number is a composite attribut...
collectively. A popular example that is used to illustrate this is a bank transfer. A defined amount is withdrawn from one account, and then it is deposited within another. The total amount of money is withdrawn and deposited, and this transaction cannot occur in any kind of partial sense. ...