After data has been loaded into a database, the tests and fine-tunes the database for performance, integrity, concurrent access, and security constraints.

Database Administrator

Explanation:

The main duty of Database Administrator is to analyse database for any errors and consider

1. Performance :

The performance of database matters is checked to see if there is any delay in retrieving data from database so that users can have a smooth data retrievals.

2. Integrity :

It is checked to see if the data retrieval is not changing the state of the data which is the data before retrieval and after it remains the same.

3. Security :

The data administrator also checks if there is any anonymous entry in the database to cause problems.

a) click on any cells in the range of data

b) click the data

c) click sort& filter group, click sort

d) select the column to sort by and then select a sort order

e) select the next column to sort by and select the sort order

f) click ok