Ask DBMS Expert


Home >> DBMS

1- What is a database?

2- Data ( ) language is used by the DBA to define schemas.

3- Please describe the three-tier client/server architecture for web applications

4- Give example of system in which it may make sense to use traditional file processing instead of a database approach.

5- Describe what entity represents in an ER mode and provide examples of entities with a physical or conceptual existence.

6- Describe how strong and weak entities differ and provide an example of each.

7- You are required to create a conceptual data model of the data requirement for a company that specializes in IT training. The company has 30 instructors and can handle up to 100 trainees per training session. The company offers five advanced technology courses, each of which is taught by a teaching team of two or more instructors. Each instructor is assigned to a maximum of two teaching teams or may be assigned to do research. Each trainee undertakes one advanced technology course per training session.

(a) Identify the main entity types for the company.

(B) Identify the main relationship types and specify the multiplicity foe each relationship. State any assumptions you make about the data.

(C) Using your answers for (a) and (B), draw a single ER diagram to repressor the data requirement for the company.

8- what is a mission statement?

9- Discuss Tow Limitations of the file-based approach.

10- discuss tow characteristics of the database approach.

11- Describe the purpose of normalization. What are the normalization processes and what happens n each step of the process?

12. Explain the function of each of the clauses in The SELECT statement.

FROM: Specifies the table or tables to be used

WHERE: Filters the rows subject to some condition

GROUP BY: Forms groups of rows with same column name

HAVING: Filters the groups subject to some condition

SELECT: Specifies which columns are to appear in the output

ORDER BY: Specifies the order of the output.

Use the figure above to write a relational algebra expression for the following questions.

13. Retrieve the birthdate and address of the employee(s) whose name -John B. Smith.

14. Retrieve the average salary of all female employees.

15. Retrieve the names of all employees who do not have supervisors.

DBMS, Programming

  • Category:- DBMS
  • Reference No.:- M91349470
  • Price:- $50

Guranteed 36 Hours Delivery, In Price:- $50

Have any Question?


Related Questions in DBMS

Data mining assignment -in this assignment you are asked to

Data Mining Assignment - In this assignment you are asked to explore the use of neural networks for classification and numeric prediction. You are also asked to carry out a data mining investigation on a real-world data ...

Sql query assignment -for this assignment you are to write

SQL Query Assignment - For this assignment you are to write your answers in a word document. This assignment is in three parts: Part A (reporting queries), Part B (query performance), Part C (query design). For this assi ...

The groceries datasetimagine 10000 receipts sitting on your

The groceries Dataset Imagine 10000 receipts sitting on your table. Each receipt represents a transaction with items that were purchased. The receipt is a representation of stuff that went into a customer's basket. That ...

You are in a real estate business renting apartments to

You are in a real estate business renting apartments to customers. Your job is to define an appropriate schema using SQL DDL in MySQL. The relations are Property(Id, Address, NumberOfUnits), Unit(ApartmentNumber, Propert ...

Objectivethe objective of this lab is to be familiar with a

OBJECTIVE: The objective of this lab is to be familiar with a process in big data modeling. You're required to produce three big data models using the MS PowerPoint software. This tool is available on UMUC Virtual Deskto ...

The relation memberstudentid organizationid roleid stores

The relation Member(StudentId, OrganizationId, RoleId) stores the membership information of student joining organization. For example, ('S1', 'O2', 'R3') indicates that student with Id 'S1' joined the organization with i ...

Relational database exerciseyou have been assigned to a new

Relational Database Exercise: You have been assigned to a new development team. A client is requesting a relational database system to manage their present store with the anticipation of adding more stores in the future. ...

Relational database design a given the following business

Relational Database Design A) Given the following business rules, identify entity types, attributes (at least two attributes for each entity, including the primary key) and relationships, and then draw an Entity-Relation ...

We can represent a data set as a collection of object nodes

We can represent a data set as a collection of object nodes and a collection of attribute nodes, where there is a link between each object and each attribute, and where the weight of that link is the value of the object ...

Data model development and implementationpurpose of the

Data model development and implementation Purpose of the assessment (with ULO Mapping) The purpose of this assignment is to develop data models and map Database System into a standard development environment to gain unde ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As