Review the following list of data management difficulties:

The amount of data increases exponentially.
Data are scattered all across the organization.
Only small portions of the data are relevant for specific decisions.
There is an ever-growing need for external data in making decisions.
Raw data may be stored in different formats.
There are legal issues involved in transferring data across country borders.
Data security, quality, and integrity are critical but easily jeopardized.

Explain how data warehousing, online transactional databases, and data mining can solve or reduce these difficulties. Be specific.