Normalization In Databases

Sometimes the database design that looks Ok at first sight may have some hidden problems. One such kind of problem is Non-Atomic Values. This means that the value that stored in a single column in the database is actually a combination of multiple values which makes the database harder to work with because you’ll always need expressions to extract the individual value. And it comes with major impact in performance as well.

source https://www.c-sharpcorner.com/article/an-overview-of-normalization-in-database/