Which of the following anomalies can occur if a database is not properly normalized?Select AnomalyInsert Anomaly

The anomalies that can occur if a database is not properly normalized include:

1. Insert Anomaly: This occurs when certain attributes cannot be inserted into the database without the presence of other attributes. For example, in a student database, you cannot insert a subject that a student is studying without inserting the student details as well.

2. Update Anomaly: This occurs when an update to any instance of a repeating group is not propagated to other instances. For example, if a student changes their address, and this address is stored in multiple places, it needs to be updated everywhere. If not, this leads to inconsistent data.

3. Delete Anomaly: This occurs when a deletion of a row causes unintended loss of data. For example, if a student drops out of all subjects, and the student's details are stored in the subjects table, deleting the subjects would also delete the student's details.

4. Select Anomaly: This is not a standard anomaly in database normalization. It might refer to difficulties in retrieving data correctly due to poor database structure.

Remember, normalization is a process in database design that organizes data to reduce redundancy and improve data integrity. It involves decomposing a table into less redundant (and smaller) tables but without losing information.