Entity Relationship (ER) Diagram Model with DBMS Example Difference between Clustered and Non-clustered index Indexing in DBMS: What is, Types of Indexes with EXAMPLES Difference Between Primary key and Unique key Popular DBMS Software Here is the list of some popular DBMS systems: MySQL Mic...
An object-oriented database (OODB) is a type of DBMS that is designed to store and manage data using object-oriented principles. Learn more about it through this blog.
The entity type is a collection of the entity having similar attributes. In the above Student table example, we have each row as an entity and they are having common attributes i.e each row has its own value for attributes Roll_no, Age, Student_name and Mobile_no. So, we can define ...
What function does an attribute of an entity perform in a DBMS? (a) What is a multivalued dependency in DBMS? (b) Give an example. If a database contains two identical records, will that necessarily have a negative effect on the integrity of the database? Why or why not...
Database (DBMS) 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 technolo...
key in a table. It is used to identify the relationships between entities. Note that foreign keys need not be unique. Multiple records can share the same values. The ER Diagram example below shows an entity with some columns, among which a foreign key is used in referencing another entity....
There are dozens of types of databases, and one of the most popular database types is relational. A relational database is a DBMS that represents the data in a tabular form of rows and columns. A table is a representation of an entity. A table is a combination of columns and rows. Ea...
A database management system (or DBMS) is essentially nothing more than a computerized data-keeping system. Users of the system are given facilities to perform several kinds of operations on such a system for either manipulation of the data in the databa
Example This is a paragraph. What is an attribute in a database management system? In a database management system (DBMS), an attribute may describe the characteristics or properties of a component or entity, such as a database table or afield. If the database is compared to aspreadsheet...
An entity relationship diagram showing relationships between sales reps, customers and product orders. A cardinality notation can then define the attributes of the relationship between the entities. Cardinalities can denote that an entity is optional (for example, a sales rep could have no customers ...