In a Data Warehouse, Information Cleansing Occurs First During the ETL

question 94

True/False

In a data warehouse, information cleansing occurs first during the ETL process and again once the information is in the data warehouse.

---

Definitions:

Cerebral Cortex

The cerebral cortex is the outer layer of neural tissue of the cerebrum in the brain, playing a key role in memory, attention, perception, cognition, awareness, thought, language, and consciousness.

Nerve Impulses

Electrical signals that travel along neurons, facilitating communication throughout the nervous system.

Standard Deviation

A statistical measure that quantifies the amount of variation or dispersion of a set of data values.

Variance

A measure of the dispersion representing the average of the squared differences from the mean in a data set.