Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A domain is a named set of values. Its main application in computing science is as a specification of the possible values of variable, or-what amounts to the same-as a constraint for an attribute in a database. Defining a domain for a set of values is essential in many computer pro ...Täielik kirjeldus
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A domain is a named set of values. Its main application in computing science is as a specification of the possible values of variable, or-what amounts to the same-as a constraint for an attribute in a database. Defining a domain for a set of values is essential in many computer programs. It ensures that incorrect data are left out, and is often used as a tool to validate data. A domain set cannot contain different types of variables. Thus, for instance, it cannot contain some integer values and some string values.