COMPUTER SCIENCE AND ENGINEERING
SQL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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rows
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columns
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tables
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databases
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Detailed explanation-1: -The degree of a relation (table) is the number of attributes (columns) in the given table. It is also called Arity. An attribute is a property or feature of an entity. An entity can have an unlimited number of attributes. One of the attributes is considered to be the primary key.
Detailed explanation-2: -Degree-The number of attributes or columns in a relation is called the Degree of the relation. Cardinality-The number of tuples/ rows in a relation is called the Cardinality of the relation.
Detailed explanation-3: -The number of columns in a table is known as the degree. The degree of the table can easily find out by analyzing the number of columns in a table. The degree of a table is the total number of attributes present in the table. The degree of the table generally contains the field name.
Detailed explanation-4: -The degree of a relationship is the number of entity types that participate(associate) in a relationship. By seeing an E-R diagram, we can simply tell the degree of a relationship i.e the number of an entity type that is connected to a relationship is the degree of that relationship .
Detailed explanation-5: -The columns in a table is a field and is also referred to as an attribute. You can also think of it this way: an attribute is used to define the record and a record contains a set of attributes.