Data truncation
In databases and computer networking data truncation occurs when data or a data stream is stored in a location too short to hold its entire length. Data truncation may occur automatically, such as when a long string is written to a smaller buffer, or deliberately, when only a portion of the data is wanted.
Depending on what type of data validation a program or operating system has, the data may be truncated silently, or the user may be given an error message.
For example, sometimes instead of rounding off a numerical value obtained from a calculation, some of the digits might just be removed i.e. truncated
