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what is object-identity
Benefits and limitations
3 assignments combined in 1
Which data type can store unstructured data? Raw data type can store unstructured data.
What is known as clustering file organization? In the clustering file organization, records of several dissimilar relations are stored in the similar file.
What is completeness constraint on generalization? Define the variation between total and partial design constraint. Give an example each. Ans: Completeness Constraints
East Coast Aquarium Relational Database
Compare the Nested-loop join and block-nested loop join Ans: Nested loop join - It is costly as worst case cost, no. of block accesses needed is n r * b s + b r where b
Define tuple variable Tuple variable is a type of variable whose domain is the set of all tuples.
What is key ? Key - A single attribute or a combination of two or more attributes of an entity set which is used to recognize one or more instances (rows) of the set (table) is
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