What are the three types of anomalies in database and
Explain?
- 9 Answers
- 90755 Views
- I also Faced
- E-Mail Answers
Answer Posted / mue timothy
Update anomalies-data inconsistency that results from data redundancy and partial update.
Deletion anomalies-unintended loss of data due to the deletion of other data.
Insertion anomalies-the inability to add data to the database due to the absence of other data.
| Is This Answer Correct ? | 12 Yes | 5 No |
Post New Answer View All Answers
On startup, the transaction log of a database has filled and recovery has suspended, what can I do?
if i want to display the name of students such that to which city they belong must have count greaer than two
If the master device is full, how do I make the master database bigger?
Why merge statement is used inside the database?
What is ole db used for?
Explain the table term used in database.
how can we view column head in first page but not in remaining pages?
List some advantages of dbms.
What is the role of driver manager?
What is the role of tester in discovery(in Checklist)?
Explain artificial key?
What the various ways to tune a teradata query
WHAT IS NEED BY METION DATFMT AND TIMFMT IN H-SEPICITION IN RPGLE?
london school of science and technology has a software development unit,known as lsst solutions,which is responsible for developing and implementing software throughout the collegejames tristan keeps a record of all student details in the college including student id,name,and start date and phone number.There are many courses offered by LSST. For example MBA, MSc, BSc, BABS, DF, English etc. Each course id identified by course id, description, duration. Each course has many semesters. Each semester takes place during a particular term. Semester details and term details are required to be stored in the database. Each course has many subjects and same subject may be offered in many courses. For each subject many details such as Subject code, name, result and attendance are required to be stored. Every subject has mainly two assessments; one assignment and one exam. Assignment is worth of 30% and exam 70% respectively. You have been appointed as a database designer. Your job is to provide ERD with all possible entities and relationships. Note: Feel free to make necessary assumptions 3: Assignment Tasks. 1. Create an ERD for the above problem 2. Translate the ERD to Relational Data model (RDM) 3. Implement the RDM by creating the tables 4. Populate the database with your own data. 5. SQL Queries for the following tasks a. List all student details in each course along with course details b. Count and display number of students in each course. c. List student name, course name, assessment description, marks for all students.
Explain database partitioning. What is its importance?
