Скачать с ютуб What Is Data Redundancy? в хорошем качестве

What Is Data Redundancy?

Data redundancy is a situation that occurs within database systems and involves the unintentional creation of duplicated data that is not necessary to the function of the database. While redundancy is often a desirable trait in some situations, this is not true when it comes to the function of a database. The presence of duplicated data can often have an adverse effect on the function of the system, resulting in returning information in response to system queries that is less than helpful. One of the key functions of data management is the identification of duplicated data and the removal of those duplications.