domänbegränsningar
Domänbegränsningar, also known as domain constraints, are rules that define the acceptable values for attributes within a database or data model. These limitations ensure data integrity and consistency by specifying the type, format, range, or set of allowed entries for a particular data field. For example, a domain constraint for an "age" attribute might specify that only positive integers between 1 and 120 are permissible. Similarly, a "gender" attribute might be restricted to only accepting "Male", "Female", or "Other".
The purpose of domain constraints is to prevent invalid or nonsensical data from being entered into the
Common types of domain constraints include data type constraints (e.g., integer, string, date), range constraints (e.g.,