COMPUTER APPLICATIONS
DATABASE MANAGEMENT SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The set of all possible values that a column may have is called as ____
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Domain
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Relation
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Degree
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Metadata
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Explanation:
Detailed explanation-1: -The set of all possible values of data items is called domain. A relational table’s column structure is defined by a domain. In a domain, there exist values. They belong to a database domain, which is a column.
Detailed explanation-2: -A domain is a set of values. A datatype, which is also defined for each column, consists of a domain of values and a set of operations on those values. The sets S1, S2, and S3 are sets of values. In the context of a database, they are domains of columns.
Detailed explanation-3: -In computing, the attribute domain is the set of values allowed in an attribute.
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