What are the three types of anomalies in database and
Explain?

Answer Posted / safiullah

there are three type of anomaly
1)insertion anomaly
2)deletion anomaly
3)modification anomaly
INSERTION ANOMALY occur when certain attribute cannot be inserted into the database without the presence of other attribute.
DELETION ANOMALY exist when certain attributes are lost because of the deletion of other attribute.
ANOMALY's MODIFICATION occur when we are not able to modifying the record in database without takecare of other facts.

Is This Answer Correct ?    5 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What are indexes in oracle?

635


What is ole db in ssis?

616


how to send multiple records which matches all the condition in the lookup transformation ? (if lookup matches the codition for duplicate values)

1595


What are the disadvantages of views in a database?

544


Which three commands cause a transaction to end?

597






How concurrency problems effect the database?

637


Explain file manager?

620


What is the best database software for small businesses?

507


Given a table Employee which has columns name and salary, write an SQL query to find the employee with the second highest salary.

592


What is the relationship that exists inside in E-R diagram?

635


Which database is best to store images?

530


WHAT IS THE PURPOSE OF TESTING INTEGRITY OF THE UNIVERSE?

1828


What is a trace file?

637


sparse lookup and where its options we find in OCI and db2?

1745


What do you mean by cluster and non cluster index?

575