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What is an E-R model? Draw an E-R Diagram for the company database with following Descriptions?
The company is organized within departments. Each department has a unique name and a unique number along with various locations. A department controls a number of projects, every of that has a unique name, unique number and a single location.
We store each employees name, social security number, address, and salary. An employee is assigned to one department but might work on several projects that are not necessarily controlled through the similar departments.
We need to keep track of the dependents of each employee for insurance purposes. We remain each dependent's name, age and relationship to the employee.
Ans. An entity-relationship model (ERM) is an abstract conceptual representation of structured data. Entity-relationship modelling is a relational schema database modelling techniques, used in software engineering to generates a type of conceptual data model (or semantic data model) of a system, frequent a relational database, and its requirements in a top-down fashion. Diagrams created using this procedure are called entity-relationship diagrams, or ER diagrams or ERDs for short.
Redo Logs: Any database must have minimum two redo logs. These are the rules for the database; the redo logs record all modifies to the system objects or user objects. If any type
what do you understand by enhanced entity-relationship
In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
Define access time. Access time is the time from when a read or write request is issued to when data transfer starts.
If the insertion violates one or more constraints, then two alternatives are available: Default option: - Insertion can be discarded and the reason of refusal can also be ex
What are domain constraints? A domain is a set of values that might be assigned to an attribute .all values that appear in a column of a relation must be taken fro
need requirement analysis for database management of stock market
Build a database application for a sports league. Assume your application is to keep track of teams and equipment that is checked out to teams. Explain the steps that is needed and
let us consider a table having 2200 records and the fixed size of the table to be considered as 25.then how many numbers of table is requredto perform horizontal fragmentation
Decompose the table with the following description and functional dependencies into a set of equivalent tables normalized to 3NF or BCNF. This database stores records from a (ve
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