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Define single valued and multivalued attributes.
Single valued attributes: attributes with a single value for a particular entity are known as single valued attributes.
Multivalued attributes: Attributes with a set of value for a particular entity are known as multivalued attributes.
Discuss along with examples about several types of attributes present in the ER model? Types of Attributes are: • SIMPLE attributes are attributes which are drawn from the ato
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List the drawbacks of relational database system A) Repetition of data B) Inability to s certain information.
define lock conversion
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What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
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